diff --git a/.circleci/config.yml b/.circleci/config.yml
index 4501d21..6ba6d92 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,45 +4,44 @@ shared_configs:
     - run:
         name: Run tests
         command: |
-          make deps test
-  full_job_steps: &full_job_steps
-    - checkout
-    - run:
-        name: Run tests
-        command: |
-          make ci
+          make test
 
 # Use the latest 2.1 version of CircleCI pipeline process engine. See: https://circleci.com/docs/2.0/configuration-reference
 version: 2.1
 jobs:
-  build-1-15:
-    working_directory: ~/repo
-    docker:
-      - image: cimg/go:1.15
-    steps: *simple_job_steps
-
-  build-1-16:
-    working_directory: ~/repo
-    docker:
-      - image: cimg/go:1.16
-    steps: *full_job_steps
-
-  build-1-17:
-    working_directory: ~/repo
-    docker:
-      - image: cimg/go:1.17
-    steps: *simple_job_steps
-
   build-1-18:
     working_directory: ~/repo
     docker:
       - image: cimg/go:1.18
     steps: *simple_job_steps
 
+  build-1-19:
+    working_directory: ~/repo
+    docker:
+      - image: cimg/go:1.19
+    steps: *simple_job_steps
+
+  build-1-20:
+    working_directory: ~/repo
+    docker:
+      - image: cimg/go:1.20
+    steps:
+      - checkout
+      - run:
+          name: Run tests and linters
+          command: |
+            make ci
+
+  build-1-21:
+    working_directory: ~/repo
+    docker:
+      - image: cimg/go:1.21
+    steps: *simple_job_steps
+
 workflows:
   pr-build-test:
     jobs:
-      - build-1-15
-      - build-1-16
-      - build-1-17
       - build-1-18
+      - build-1-19
+      - build-1-20
+      - build-1-21
diff --git a/.github/workflows/codesee-arch-diagram.yml b/.github/workflows/codesee-arch-diagram.yml
new file mode 100644
index 0000000..a2fbc75
--- /dev/null
+++ b/.github/workflows/codesee-arch-diagram.yml
@@ -0,0 +1,22 @@
+# This workflow was added by CodeSee. Learn more at https://codesee.io/
+# This is v2.0 of this workflow file
+on:
+  push:
+    branches:
+      - master
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+name: CodeSee
+
+permissions: read-all
+
+jobs:
+  codesee:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    name: Analyze the repo with CodeSee
+    steps:
+      - uses: Codesee-io/codesee-action@v2
+        with:
+          codesee-token: ${{ secrets.CODESEE_ARCH_DIAG_API_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 1faa9a6..3a2f7da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 dist/
 .idea/
 VERSION
+.tmp/
diff --git a/Makefile b/Makefile
index 3de66ee..1317cab 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,16 @@
 dev_build_version=$(shell git describe --tags --always --dirty)
 
+export PATH := $(shell pwd)/.tmp/protoc/bin:$(PATH)
+
+export PROTOC_VERSION := 22.0
+
 # TODO: run golint and errcheck, but only to catch *new* violations and
 # decide whether to change code or not (e.g. we need to be able to whitelist
 # violations already in the code). They can be useful to catch errors, but
 # they are just too noisy to be a requirement for a CI -- we don't even *want*
 # to fix some of the things they consider to be violations.
 .PHONY: ci
-ci: deps checkgofmt vet staticcheck ineffassign predeclared test
+ci: deps checkgofmt checkgenerate vet staticcheck ineffassign predeclared test
 
 .PHONY: deps
 deps:
@@ -22,7 +26,7 @@ install:
 
 .PHONY: release
 release:
-	@go install github.com/goreleaser/goreleaser@v1.5.0
+	@go install github.com/goreleaser/goreleaser@v1.10.0
 	goreleaser release --rm-dist
 
 .PHONY: docker
@@ -31,6 +35,20 @@ docker:
 	docker build -t fullstorydev/grpcurl:$(dev_build_version) .
 	@rm VERSION
 
+.PHONY: generate
+generate: .tmp/protoc/bin/protoc
+	@go install google.golang.org/protobuf/cmd/protoc-gen-go@a709e31e5d12
+	@go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1.0
+	go generate ./...
+
+.PHONY: checkgenerate
+checkgenerate: generate
+	git status --porcelain
+	@if [ -n "$$(git status --porcelain)" ]; then \
+		git diff; \
+		exit 1; \
+	fi
+
 .PHONY: checkgofmt
 checkgofmt:
 	gofmt -s -l .
@@ -42,11 +60,9 @@ checkgofmt:
 vet:
 	go vet ./...
 
-# This all works fine with Go modules, but without modules,
-# CI is just getting latest master for dependencies like grpc.
 .PHONY: staticcheck
 staticcheck:
-	@go install honnef.co/go/tools/cmd/staticcheck@v0.0.1-2020.1.4
+	@go install honnef.co/go/tools/cmd/staticcheck@v0.4.3
 	staticcheck ./...
 
 .PHONY: ineffassign
@@ -56,23 +72,25 @@ ineffassign:
 
 .PHONY: predeclared
 predeclared:
-	@go install github.com/nishanths/predeclared@86fad755b4d3
-	predeclared .
+	@go install github.com/nishanths/predeclared@5f2f810c9ae6
+	predeclared ./...
 
 # Intentionally omitted from CI, but target here for ad-hoc reports.
 .PHONY: golint
 golint:
-	# TODO: pin version
-	@go install golang.org/x/lint/golint@latest
+	@go install golang.org/x/lint/golint@v0.0.0-20210508222113-6edffad5e616
 	golint -min_confidence 0.9 -set_exit_status ./...
 
 # Intentionally omitted from CI, but target here for ad-hoc reports.
 .PHONY: errcheck
 errcheck:
-	# TODO: pin version
-	@go install github.com/kisielk/errcheck@latest
+	@go install github.com/kisielk/errcheck@v1.2.0
 	errcheck ./...
 
 .PHONY: test
 test:
 	go test -race ./...
+
+.tmp/protoc/bin/protoc: ./Makefile ./download_protoc.sh
+	./download_protoc.sh
+
diff --git a/README.md b/README.md
index cbb7e4f..4996018 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This program accepts messages using JSON encoding, which is much more friendly f
 humans and scripts.
 
 With this tool you can also browse the schema for gRPC services, either by querying
-a server that supports [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto),
+a server that supports [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1/reflection.proto),
 by reading proto source files, or by loading in compiled "protoset" files (files that contain
 encoded file [descriptor protos](https://github.com/google/protobuf/blob/master/src/google/protobuf/descriptor.proto)).
 In fact, the way the tool transforms JSON request data into a binary encoded protobuf
@@ -192,7 +192,7 @@ are needed to use them.
 
 ### Server Reflection
 
-Without any additional command-line flags, `grpcurl` will try to use [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto).
+Without any additional command-line flags, `grpcurl` will try to use [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1/reflection.proto).
 
 Examples for how to set up server reflection can be found [here](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md#known-implementations).
 
diff --git a/cmd/grpcurl/go1_10.go b/cmd/grpcurl/go1_10.go
index ff96b0e..815e672 100644
--- a/cmd/grpcurl/go1_10.go
+++ b/cmd/grpcurl/go1_10.go
@@ -1,3 +1,4 @@
+//go:build go1.10
 // +build go1.10
 
 package main
diff --git a/cmd/grpcurl/go1_9.go b/cmd/grpcurl/go1_9.go
index 8a2a30d..0b2774e 100644
--- a/cmd/grpcurl/go1_9.go
+++ b/cmd/grpcurl/go1_9.go
@@ -1,3 +1,4 @@
+//go:build !go1.10
 // +build !go1.10
 
 package main
diff --git a/cmd/grpcurl/grpcurl.go b/cmd/grpcurl/grpcurl.go
index 9028a20..860c520 100644
--- a/cmd/grpcurl/grpcurl.go
+++ b/cmd/grpcurl/grpcurl.go
@@ -22,7 +22,6 @@ import (
 	"google.golang.org/grpc/credentials/alts"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/metadata"
-	reflectpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/descriptorpb"
 
@@ -39,9 +38,9 @@ import (
 // the response status codes emitted use an offest of 64
 const statusCodeOffset = 64
 
-const no_version = "dev build <no version set>"
+const noVersion = "dev build <no version set>"
 
-var version = no_version
+var version = noVersion
 
 var (
 	exit = os.Exit
@@ -489,7 +488,7 @@ func main() {
 		}
 
 		grpcurlUA := "grpcurl/" + version
-		if version == no_version {
+		if version == noVersion {
 			grpcurlUA = "grpcurl/dev-build (no version set)"
 		}
 		if *userAgent != "" {
@@ -552,7 +551,7 @@ func main() {
 		md := grpcurl.MetadataFromHeaders(append(addlHeaders, reflHeaders...))
 		refCtx := metadata.NewOutgoingContext(ctx, md)
 		cc = dial()
-		refClient = grpcreflect.NewClient(refCtx, reflectpb.NewServerReflectionClient(cc))
+		refClient = grpcreflect.NewClientAuto(refCtx, cc)
 		reflSource := grpcurl.DescriptorSourceFromServer(ctx, refClient)
 		if fileSource != nil {
 			descSource = compositeSource{reflSource, fileSource}
diff --git a/cmd/grpcurl/unix.go b/cmd/grpcurl/unix.go
index e79a28a..cae4bed 100644
--- a/cmd/grpcurl/unix.go
+++ b/cmd/grpcurl/unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || windows
 // +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
 
 package main
diff --git a/download_protoc.sh b/download_protoc.sh
new file mode 100755
index 0000000..6bbd135
--- /dev/null
+++ b/download_protoc.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -e
+
+cd $(dirname $0)
+
+if [[ -z "$PROTOC_VERSION" ]]; then
+  echo "Set PROTOC_VERSION env var to indicate the version to download" >&2
+  exit 1
+fi
+PROTOC_OS="$(uname -s)"
+PROTOC_ARCH="$(uname -m)"
+case "${PROTOC_OS}" in
+  Darwin) PROTOC_OS="osx" ;;
+  Linux) PROTOC_OS="linux" ;;
+  *)
+    echo "Invalid value for uname -s: ${PROTOC_OS}" >&2
+    exit 1
+esac
+
+# This is for macs with M1 chips. Precompiled binaries for osx/amd64 are not available for download, so for that case
+# we download the x86_64 version instead. This will work as long as rosetta2 is installed.
+if [ "$PROTOC_OS" = "osx" ] && [ "$PROTOC_ARCH" = "arm64" ]; then
+  PROTOC_ARCH="x86_64"
+fi
+
+PROTOC="${PWD}/.tmp/protoc/bin/protoc"
+
+if [[ "$(${PROTOC} --version 2>/dev/null)" != "libprotoc 3.${PROTOC_VERSION}" ]]; then
+  rm -rf ./.tmp/protoc
+  mkdir -p .tmp/protoc
+  curl -L "https://github.com/google/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-${PROTOC_OS}-${PROTOC_ARCH}.zip" > .tmp/protoc/protoc.zip
+  pushd ./.tmp/protoc && unzip protoc.zip && popd
+fi
+
diff --git a/format.go b/format.go
index 20de407..8672ef0 100644
--- a/format.go
+++ b/format.go
@@ -136,10 +136,25 @@ type Formatter func(proto.Message) (string, error)
 func NewJSONFormatter(emitDefaults bool, resolver jsonpb.AnyResolver) Formatter {
 	marshaler := jsonpb.Marshaler{
 		EmitDefaults: emitDefaults,
-		Indent:       "  ",
 		AnyResolver:  resolver,
 	}
-	return marshaler.MarshalToString
+	// Workaround for indentation issue in jsonpb with Any messages.
+	// Bug was originally fixed in https://github.com/golang/protobuf/pull/834
+	// but later re-introduced before the module was deprecated and frozen.
+	// If jsonpb is ever replaced with google.golang.org/protobuf/encoding/protojson
+	// this workaround will no longer be needed.
+	formatter := func(message proto.Message) (string, error) {
+		output, err := marshaler.MarshalToString(message)
+		if err != nil {
+			return "", err
+		}
+		var buf bytes.Buffer
+		if err := json.Indent(&buf, []byte(output), "", "  "); err != nil {
+			return "", err
+		}
+		return buf.String(), nil
+	}
+	return formatter
 }
 
 // NewTextFormatter returns a formatter that returns strings in the protobuf
@@ -197,10 +212,20 @@ func (tf *textFormatter) format(m proto.Message) (string, error) {
 	return str, nil
 }
 
+// Format of request data. The allowed values are 'json' or 'text'.
 type Format string
 
 const (
+	// FormatJSON specifies input data in JSON format. Multiple request values
+	// may be concatenated (messages with a JSON representation other than
+	// object must be separated by whitespace, such as a newline)
 	FormatJSON = Format("json")
+
+	// FormatText specifies input data must be in the protobuf text format.
+	// Multiple request values must be separated by the "record separator"
+	// ASCII character: 0x1E. The stream should not end in a record separator.
+	// If it does, it will be interpreted as a final, blank message after the
+	// separator.
 	FormatText = Format("text")
 )
 
@@ -264,11 +289,11 @@ func (r *anyResolver) Resolve(typeUrl string) (proto.Message, error) {
 	if !ok {
 		return nil, fmt.Errorf("unknown message: %s", typeUrl)
 	}
-	// populate any extensions for this message, too
-	if exts, err := r.source.AllExtensionsForType(mname); err != nil {
-		return nil, err
-	} else if err := r.er.AddExtension(exts...); err != nil {
-		return nil, err
+	// populate any extensions for this message, too (if there are any)
+	if exts, err := r.source.AllExtensionsForType(mname); err == nil {
+		if err := r.er.AddExtension(exts...); err != nil {
+			return nil, err
+		}
 	}
 
 	if r.mf == nil {
diff --git a/go.mod b/go.mod
index c614816..494cfa2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,31 @@
 module github.com/fullstorydev/grpcurl
 
-go 1.15
+go 1.18
 
 require (
-	cloud.google.com/go v0.56.0 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/golang/protobuf v1.5.2
-	github.com/jhump/protoreflect v1.13.0
-	golang.org/x/text v0.3.7 // indirect
-	google.golang.org/grpc v1.50.1
-	google.golang.org/protobuf v1.28.1
+	github.com/golang/protobuf v1.5.3
+	github.com/jhump/protoreflect v1.15.2
+	google.golang.org/grpc v1.57.0
+	google.golang.org/protobuf v1.31.0
+)
+
+require (
+	cloud.google.com/go/compute v1.19.1 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	github.com/bufbuild/protocompile v0.6.0 // indirect
+	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cncf/udpa/go v0.0.0-20220112060539-c52dc94e7fbe // indirect
+	github.com/cncf/xds/go v0.0.0-20230607035331-e9ce68804cb4 // indirect
+	github.com/envoyproxy/go-control-plane v0.11.1-0.20230524094728-9239064ad72f // indirect
+	github.com/envoyproxy/protoc-gen-validate v0.10.1 // indirect
+	golang.org/x/net v0.9.0 // indirect
+	golang.org/x/oauth2 v0.7.0 // indirect
+	golang.org/x/sync v0.3.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20230526161137-0005af68ea54 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20230525234035-dd9d682886f9 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 // indirect
 )
diff --git a/go.sum b/go.sum
index 7c1ca9e..eff7a00 100644
--- a/go.sum
+++ b/go.sum
@@ -1,358 +1,106 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.56.0 h1:WRz29PgAsVEyPSDHyk+0fpEkwEFyfhHn+JbksT6gIL4=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+cloud.google.com/go/compute v1.19.1 h1:am86mquDUgjGNWxiGn+5PGLbmgiWXlE/yNWpIpNvuXY=
+cloud.google.com/go/compute v1.19.1/go.mod h1:6ylj3a05WF8leseCdIf77NK0g1ey+nj5IKd5/kvShxE=
+cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
+github.com/bufbuild/protocompile v0.6.0 h1:Uu7WiSQ6Yj9DbkdnOe7U4mNKp58y9WDMKDn28/ZlunY=
+github.com/bufbuild/protocompile v0.6.0/go.mod h1:YNP35qEYoYGme7QMtz5SBCoN4kL4g12jTtjuzRNdjpE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/grpcurl.go b/grpcurl.go
index f36fc9e..6010b3a 100644
--- a/grpcurl.go
+++ b/grpcurl.go
@@ -329,7 +329,7 @@ func fetchAllExtensions(source DescriptorSource, ext *dynamic.ExtensionRegistry,
 	return nil
 }
 
-// fullConvertToDynamic attempts to convert the given message to a dynamic message as well
+// fullyConvertToDynamic attempts to convert the given message to a dynamic message as well
 // as any nested messages it may contain as field values. If the given message factory has
 // extensions registered that were not known when the given message was parsed, this effectively
 // allows re-parsing to identify those extensions.
@@ -407,9 +407,9 @@ func makeTemplate(md *desc.MessageDescriptor, path []*desc.MessageDescriptor) pr
 	case "google.protobuf.Any":
 		// empty type URL is not allowed by JSON representation
 		// so we must give it a dummy type
-		var any anypb.Any
-		_ = anypb.MarshalFrom(&any, &emptypb.Empty{}, protov2.MarshalOptions{})
-		return &any
+		var anyVal anypb.Any
+		_ = anypb.MarshalFrom(&anyVal, &emptypb.Empty{}, protov2.MarshalOptions{})
+		return &anyVal
 	case "google.protobuf.Value":
 		// unset kind is not allowed by JSON representation
 		// so we must give it something
diff --git a/grpcurl_test.go b/grpcurl_test.go
index 25b4276..018a6eb 100644
--- a/grpcurl_test.go
+++ b/grpcurl_test.go
@@ -21,7 +21,6 @@ import (
 	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/reflection"
-	reflectpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
 	"google.golang.org/grpc/status"
 
 	. "github.com/fullstorydev/grpcurl"
@@ -82,7 +81,7 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 	defer ccReflect.Close()
-	refClient := grpcreflect.NewClient(context.Background(), reflectpb.NewServerReflectionClient(ccReflect))
+	refClient := grpcreflect.NewClientAuto(context.Background(), ccReflect)
 	defer refClient.Reset()
 
 	sourceReflect = DescriptorSourceFromServer(context.Background(), refClient)
@@ -118,7 +117,7 @@ func TestMain(m *testing.M) {
 }
 
 func TestServerDoesNotSupportReflection(t *testing.T) {
-	refClient := grpcreflect.NewClient(context.Background(), reflectpb.NewServerReflectionClient(ccNoReflect))
+	refClient := grpcreflect.NewClientAuto(context.Background(), ccNoReflect)
 	defer refClient.Reset()
 
 	refSource := DescriptorSourceFromServer(context.Background(), refClient)
@@ -178,7 +177,7 @@ func doTestListServices(t *testing.T, source DescriptorSource, includeReflection
 	var expected []string
 	if includeReflection {
 		// when using server reflection, we see the TestService as well as the ServerReflection service
-		expected = []string{"grpc.reflection.v1alpha.ServerReflection", "testing.TestService"}
+		expected = []string{"grpc.reflection.v1.ServerReflection", "grpc.reflection.v1alpha.ServerReflection", "testing.TestService"}
 	} else {
 		// without reflection, we see all services defined in the same test.proto file, which is the
 		// TestService as well as UnimplementedService
@@ -216,11 +215,11 @@ func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection
 
 	if includeReflection {
 		// when using server reflection, we see the TestService as well as the ServerReflection service
-		names, err = ListMethods(source, "grpc.reflection.v1alpha.ServerReflection")
+		names, err = ListMethods(source, "grpc.reflection.v1.ServerReflection")
 		if err != nil {
 			t.Fatalf("failed to list methods for ServerReflection: %v", err)
 		}
-		expected = []string{"grpc.reflection.v1alpha.ServerReflection.ServerReflectionInfo"}
+		expected = []string{"grpc.reflection.v1.ServerReflection.ServerReflectionInfo"}
 	} else {
 		// without reflection, we see all services defined in the same test.proto file, which is the
 		// TestService as well as UnimplementedService
@@ -243,12 +242,8 @@ func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection
 
 func TestGetAllFiles(t *testing.T) {
 	expectedFiles := []string{"test.proto"}
-	// server reflection picks up filename from linked in Go package,
-	// which indicates "grpc_testing/test.proto", not our local copy.
-	expectedFilesWithReflection := [][]string{
-		{"grpc_reflection_v1alpha/reflection.proto", "test.proto"},
-		// depending on the version of grpc, the filenames could be prefixed with "interop/" and "reflection/"
-		{"reflection/grpc_reflection_v1alpha/reflection.proto", "test.proto"},
+	expectedFilesWithReflection := []string{
+		"grpc/reflection/v1/reflection.proto", "grpc/reflection/v1alpha/reflection.proto", "test.proto",
 	}
 
 	for _, ds := range descSources {
@@ -261,17 +256,11 @@ func TestGetAllFiles(t *testing.T) {
 			match := false
 			var expected []string
 			if ds.includeRefl {
-				for _, expectedNames := range expectedFilesWithReflection {
-					expected = expectedNames
-					if reflect.DeepEqual(expected, names) {
-						match = true
-						break
-					}
-				}
+				expected = expectedFilesWithReflection
 			} else {
 				expected = expectedFiles
-				match = reflect.DeepEqual(expected, names)
 			}
+			match = reflect.DeepEqual(expected, names)
 			if !match {
 				t.Errorf("GetAllFiles returned wrong results: wanted %v, got %v", expected, names)
 			}
diff --git a/internal/testing/cmd/bankdemo/bank.go b/internal/testing/cmd/bankdemo/bank.go
index 9b1de20..efbe7ae 100644
--- a/internal/testing/cmd/bankdemo/bank.go
+++ b/internal/testing/cmd/bankdemo/bank.go
@@ -12,6 +12,7 @@ import (
 
 // bankServer implements the Bank gRPC service.
 type bankServer struct {
+	UnimplementedBankServer
 	allAccounts *accounts
 }
 
diff --git a/internal/testing/cmd/bankdemo/bank.pb.go b/internal/testing/cmd/bankdemo/bank.pb.go
index 43f86ba..b6f1f40 100644
--- a/internal/testing/cmd/bankdemo/bank.pb.go
+++ b/internal/testing/cmd/bankdemo/bank.pb.go
@@ -1,17 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0-devel
-// 	protoc        v3.14.0
+// 	protoc        v4.22.0
 // source: bank.proto
 
 package main
 
 import (
-	context "context"
 	proto "github.com/golang/protobuf/proto"
-	grpc "google.golang.org/grpc"
-	codes "google.golang.org/grpc/codes"
-	status "google.golang.org/grpc/status"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	emptypb "google.golang.org/protobuf/types/known/emptypb"
@@ -696,10 +692,12 @@ type TransferRequest struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Source:
+	//
 	//	*TransferRequest_SourceAccountNumber
 	//	*TransferRequest_ExternalSource
 	Source isTransferRequest_Source `protobuf_oneof:"source"`
 	// Types that are assignable to Dest:
+	//
 	//	*TransferRequest_DestAccountNumber
 	//	*TransferRequest_ExternalDest
 	Dest        isTransferRequest_Dest `protobuf_oneof:"dest"`
@@ -1347,355 +1345,3 @@ func file_bank_proto_init() {
 	file_bank_proto_goTypes = nil
 	file_bank_proto_depIdxs = nil
 }
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConnInterface
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
-
-// BankClient is the client API for Bank service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type BankClient interface {
-	// OpenAccount creates an account with the type and given initial deposit
-	// as its balance.
-	OpenAccount(ctx context.Context, in *OpenAccountRequest, opts ...grpc.CallOption) (*Account, error)
-	// CloseAccount closes the indicated account. An account can only be
-	// closed if its balance is zero.
-	CloseAccount(ctx context.Context, in *CloseAccountRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
-	// GetAccounts lists all accounts for the current customer.
-	GetAccounts(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetAccountsResponse, error)
-	// GetTransactions streams all transactions that match the given criteria.
-	// If the given start date is not specified, transactions since beginning
-	// of time are included. Similarly, if the given end date is not specified,
-	// transactions all the way to the presnet are included.
-	GetTransactions(ctx context.Context, in *GetTransactionsRequest, opts ...grpc.CallOption) (Bank_GetTransactionsClient, error)
-	// Deposit increases the balance of an account by depositing funds into it.
-	Deposit(ctx context.Context, in *DepositRequest, opts ...grpc.CallOption) (*BalanceResponse, error)
-	// Withdraw decreases the balance of an account by withdrawing funds from it.
-	Withdraw(ctx context.Context, in *WithdrawRequest, opts ...grpc.CallOption) (*BalanceResponse, error)
-	// Transfer moves money from one account to another. The source and destination
-	// accounts can be with this bank (e.g. "local" account numbers) or can be
-	// external accounts, identified by their ACH routing and account numbers.
-	Transfer(ctx context.Context, in *TransferRequest, opts ...grpc.CallOption) (*TransferResponse, error)
-}
-
-type bankClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewBankClient(cc grpc.ClientConnInterface) BankClient {
-	return &bankClient{cc}
-}
-
-func (c *bankClient) OpenAccount(ctx context.Context, in *OpenAccountRequest, opts ...grpc.CallOption) (*Account, error) {
-	out := new(Account)
-	err := c.cc.Invoke(ctx, "/Bank/OpenAccount", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *bankClient) CloseAccount(ctx context.Context, in *CloseAccountRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
-	out := new(emptypb.Empty)
-	err := c.cc.Invoke(ctx, "/Bank/CloseAccount", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *bankClient) GetAccounts(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetAccountsResponse, error) {
-	out := new(GetAccountsResponse)
-	err := c.cc.Invoke(ctx, "/Bank/GetAccounts", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *bankClient) GetTransactions(ctx context.Context, in *GetTransactionsRequest, opts ...grpc.CallOption) (Bank_GetTransactionsClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Bank_serviceDesc.Streams[0], "/Bank/GetTransactions", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &bankGetTransactionsClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
-	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	return x, nil
-}
-
-type Bank_GetTransactionsClient interface {
-	Recv() (*Transaction, error)
-	grpc.ClientStream
-}
-
-type bankGetTransactionsClient struct {
-	grpc.ClientStream
-}
-
-func (x *bankGetTransactionsClient) Recv() (*Transaction, error) {
-	m := new(Transaction)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func (c *bankClient) Deposit(ctx context.Context, in *DepositRequest, opts ...grpc.CallOption) (*BalanceResponse, error) {
-	out := new(BalanceResponse)
-	err := c.cc.Invoke(ctx, "/Bank/Deposit", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *bankClient) Withdraw(ctx context.Context, in *WithdrawRequest, opts ...grpc.CallOption) (*BalanceResponse, error) {
-	out := new(BalanceResponse)
-	err := c.cc.Invoke(ctx, "/Bank/Withdraw", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *bankClient) Transfer(ctx context.Context, in *TransferRequest, opts ...grpc.CallOption) (*TransferResponse, error) {
-	out := new(TransferResponse)
-	err := c.cc.Invoke(ctx, "/Bank/Transfer", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-// BankServer is the server API for Bank service.
-type BankServer interface {
-	// OpenAccount creates an account with the type and given initial deposit
-	// as its balance.
-	OpenAccount(context.Context, *OpenAccountRequest) (*Account, error)
-	// CloseAccount closes the indicated account. An account can only be
-	// closed if its balance is zero.
-	CloseAccount(context.Context, *CloseAccountRequest) (*emptypb.Empty, error)
-	// GetAccounts lists all accounts for the current customer.
-	GetAccounts(context.Context, *emptypb.Empty) (*GetAccountsResponse, error)
-	// GetTransactions streams all transactions that match the given criteria.
-	// If the given start date is not specified, transactions since beginning
-	// of time are included. Similarly, if the given end date is not specified,
-	// transactions all the way to the presnet are included.
-	GetTransactions(*GetTransactionsRequest, Bank_GetTransactionsServer) error
-	// Deposit increases the balance of an account by depositing funds into it.
-	Deposit(context.Context, *DepositRequest) (*BalanceResponse, error)
-	// Withdraw decreases the balance of an account by withdrawing funds from it.
-	Withdraw(context.Context, *WithdrawRequest) (*BalanceResponse, error)
-	// Transfer moves money from one account to another. The source and destination
-	// accounts can be with this bank (e.g. "local" account numbers) or can be
-	// external accounts, identified by their ACH routing and account numbers.
-	Transfer(context.Context, *TransferRequest) (*TransferResponse, error)
-}
-
-// UnimplementedBankServer can be embedded to have forward compatible implementations.
-type UnimplementedBankServer struct {
-}
-
-func (*UnimplementedBankServer) OpenAccount(context.Context, *OpenAccountRequest) (*Account, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method OpenAccount not implemented")
-}
-func (*UnimplementedBankServer) CloseAccount(context.Context, *CloseAccountRequest) (*emptypb.Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method CloseAccount not implemented")
-}
-func (*UnimplementedBankServer) GetAccounts(context.Context, *emptypb.Empty) (*GetAccountsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetAccounts not implemented")
-}
-func (*UnimplementedBankServer) GetTransactions(*GetTransactionsRequest, Bank_GetTransactionsServer) error {
-	return status.Errorf(codes.Unimplemented, "method GetTransactions not implemented")
-}
-func (*UnimplementedBankServer) Deposit(context.Context, *DepositRequest) (*BalanceResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Deposit not implemented")
-}
-func (*UnimplementedBankServer) Withdraw(context.Context, *WithdrawRequest) (*BalanceResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Withdraw not implemented")
-}
-func (*UnimplementedBankServer) Transfer(context.Context, *TransferRequest) (*TransferResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Transfer not implemented")
-}
-
-func RegisterBankServer(s *grpc.Server, srv BankServer) {
-	s.RegisterService(&_Bank_serviceDesc, srv)
-}
-
-func _Bank_OpenAccount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(OpenAccountRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).OpenAccount(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/OpenAccount",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).OpenAccount(ctx, req.(*OpenAccountRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Bank_CloseAccount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(CloseAccountRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).CloseAccount(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/CloseAccount",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).CloseAccount(ctx, req.(*CloseAccountRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Bank_GetAccounts_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(emptypb.Empty)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).GetAccounts(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/GetAccounts",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).GetAccounts(ctx, req.(*emptypb.Empty))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Bank_GetTransactions_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(GetTransactionsRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(BankServer).GetTransactions(m, &bankGetTransactionsServer{stream})
-}
-
-type Bank_GetTransactionsServer interface {
-	Send(*Transaction) error
-	grpc.ServerStream
-}
-
-type bankGetTransactionsServer struct {
-	grpc.ServerStream
-}
-
-func (x *bankGetTransactionsServer) Send(m *Transaction) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func _Bank_Deposit_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(DepositRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).Deposit(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/Deposit",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).Deposit(ctx, req.(*DepositRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Bank_Withdraw_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(WithdrawRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).Withdraw(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/Withdraw",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).Withdraw(ctx, req.(*WithdrawRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Bank_Transfer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(TransferRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BankServer).Transfer(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/Bank/Transfer",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BankServer).Transfer(ctx, req.(*TransferRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _Bank_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "Bank",
-	HandlerType: (*BankServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "OpenAccount",
-			Handler:    _Bank_OpenAccount_Handler,
-		},
-		{
-			MethodName: "CloseAccount",
-			Handler:    _Bank_CloseAccount_Handler,
-		},
-		{
-			MethodName: "GetAccounts",
-			Handler:    _Bank_GetAccounts_Handler,
-		},
-		{
-			MethodName: "Deposit",
-			Handler:    _Bank_Deposit_Handler,
-		},
-		{
-			MethodName: "Withdraw",
-			Handler:    _Bank_Withdraw_Handler,
-		},
-		{
-			MethodName: "Transfer",
-			Handler:    _Bank_Transfer_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "GetTransactions",
-			Handler:       _Bank_GetTransactions_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "bank.proto",
-}
diff --git a/internal/testing/cmd/bankdemo/bank_grpc.pb.go b/internal/testing/cmd/bankdemo/bank_grpc.pb.go
new file mode 100644
index 0000000..a71abb0
--- /dev/null
+++ b/internal/testing/cmd/bankdemo/bank_grpc.pb.go
@@ -0,0 +1,374 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package main
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// BankClient is the client API for Bank service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type BankClient interface {
+	// OpenAccount creates an account with the type and given initial deposit
+	// as its balance.
+	OpenAccount(ctx context.Context, in *OpenAccountRequest, opts ...grpc.CallOption) (*Account, error)
+	// CloseAccount closes the indicated account. An account can only be
+	// closed if its balance is zero.
+	CloseAccount(ctx context.Context, in *CloseAccountRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
+	// GetAccounts lists all accounts for the current customer.
+	GetAccounts(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetAccountsResponse, error)
+	// GetTransactions streams all transactions that match the given criteria.
+	// If the given start date is not specified, transactions since beginning
+	// of time are included. Similarly, if the given end date is not specified,
+	// transactions all the way to the presnet are included.
+	GetTransactions(ctx context.Context, in *GetTransactionsRequest, opts ...grpc.CallOption) (Bank_GetTransactionsClient, error)
+	// Deposit increases the balance of an account by depositing funds into it.
+	Deposit(ctx context.Context, in *DepositRequest, opts ...grpc.CallOption) (*BalanceResponse, error)
+	// Withdraw decreases the balance of an account by withdrawing funds from it.
+	Withdraw(ctx context.Context, in *WithdrawRequest, opts ...grpc.CallOption) (*BalanceResponse, error)
+	// Transfer moves money from one account to another. The source and destination
+	// accounts can be with this bank (e.g. "local" account numbers) or can be
+	// external accounts, identified by their ACH routing and account numbers.
+	Transfer(ctx context.Context, in *TransferRequest, opts ...grpc.CallOption) (*TransferResponse, error)
+}
+
+type bankClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewBankClient(cc grpc.ClientConnInterface) BankClient {
+	return &bankClient{cc}
+}
+
+func (c *bankClient) OpenAccount(ctx context.Context, in *OpenAccountRequest, opts ...grpc.CallOption) (*Account, error) {
+	out := new(Account)
+	err := c.cc.Invoke(ctx, "/Bank/OpenAccount", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *bankClient) CloseAccount(ctx context.Context, in *CloseAccountRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
+	out := new(emptypb.Empty)
+	err := c.cc.Invoke(ctx, "/Bank/CloseAccount", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *bankClient) GetAccounts(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetAccountsResponse, error) {
+	out := new(GetAccountsResponse)
+	err := c.cc.Invoke(ctx, "/Bank/GetAccounts", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *bankClient) GetTransactions(ctx context.Context, in *GetTransactionsRequest, opts ...grpc.CallOption) (Bank_GetTransactionsClient, error) {
+	stream, err := c.cc.NewStream(ctx, &Bank_ServiceDesc.Streams[0], "/Bank/GetTransactions", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &bankGetTransactionsClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type Bank_GetTransactionsClient interface {
+	Recv() (*Transaction, error)
+	grpc.ClientStream
+}
+
+type bankGetTransactionsClient struct {
+	grpc.ClientStream
+}
+
+func (x *bankGetTransactionsClient) Recv() (*Transaction, error) {
+	m := new(Transaction)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *bankClient) Deposit(ctx context.Context, in *DepositRequest, opts ...grpc.CallOption) (*BalanceResponse, error) {
+	out := new(BalanceResponse)
+	err := c.cc.Invoke(ctx, "/Bank/Deposit", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *bankClient) Withdraw(ctx context.Context, in *WithdrawRequest, opts ...grpc.CallOption) (*BalanceResponse, error) {
+	out := new(BalanceResponse)
+	err := c.cc.Invoke(ctx, "/Bank/Withdraw", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *bankClient) Transfer(ctx context.Context, in *TransferRequest, opts ...grpc.CallOption) (*TransferResponse, error) {
+	out := new(TransferResponse)
+	err := c.cc.Invoke(ctx, "/Bank/Transfer", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// BankServer is the server API for Bank service.
+// All implementations must embed UnimplementedBankServer
+// for forward compatibility
+type BankServer interface {
+	// OpenAccount creates an account with the type and given initial deposit
+	// as its balance.
+	OpenAccount(context.Context, *OpenAccountRequest) (*Account, error)
+	// CloseAccount closes the indicated account. An account can only be
+	// closed if its balance is zero.
+	CloseAccount(context.Context, *CloseAccountRequest) (*emptypb.Empty, error)
+	// GetAccounts lists all accounts for the current customer.
+	GetAccounts(context.Context, *emptypb.Empty) (*GetAccountsResponse, error)
+	// GetTransactions streams all transactions that match the given criteria.
+	// If the given start date is not specified, transactions since beginning
+	// of time are included. Similarly, if the given end date is not specified,
+	// transactions all the way to the presnet are included.
+	GetTransactions(*GetTransactionsRequest, Bank_GetTransactionsServer) error
+	// Deposit increases the balance of an account by depositing funds into it.
+	Deposit(context.Context, *DepositRequest) (*BalanceResponse, error)
+	// Withdraw decreases the balance of an account by withdrawing funds from it.
+	Withdraw(context.Context, *WithdrawRequest) (*BalanceResponse, error)
+	// Transfer moves money from one account to another. The source and destination
+	// accounts can be with this bank (e.g. "local" account numbers) or can be
+	// external accounts, identified by their ACH routing and account numbers.
+	Transfer(context.Context, *TransferRequest) (*TransferResponse, error)
+	mustEmbedUnimplementedBankServer()
+}
+
+// UnimplementedBankServer must be embedded to have forward compatible implementations.
+type UnimplementedBankServer struct {
+}
+
+func (UnimplementedBankServer) OpenAccount(context.Context, *OpenAccountRequest) (*Account, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method OpenAccount not implemented")
+}
+func (UnimplementedBankServer) CloseAccount(context.Context, *CloseAccountRequest) (*emptypb.Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CloseAccount not implemented")
+}
+func (UnimplementedBankServer) GetAccounts(context.Context, *emptypb.Empty) (*GetAccountsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetAccounts not implemented")
+}
+func (UnimplementedBankServer) GetTransactions(*GetTransactionsRequest, Bank_GetTransactionsServer) error {
+	return status.Errorf(codes.Unimplemented, "method GetTransactions not implemented")
+}
+func (UnimplementedBankServer) Deposit(context.Context, *DepositRequest) (*BalanceResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Deposit not implemented")
+}
+func (UnimplementedBankServer) Withdraw(context.Context, *WithdrawRequest) (*BalanceResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Withdraw not implemented")
+}
+func (UnimplementedBankServer) Transfer(context.Context, *TransferRequest) (*TransferResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Transfer not implemented")
+}
+func (UnimplementedBankServer) mustEmbedUnimplementedBankServer() {}
+
+// UnsafeBankServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to BankServer will
+// result in compilation errors.
+type UnsafeBankServer interface {
+	mustEmbedUnimplementedBankServer()
+}
+
+func RegisterBankServer(s grpc.ServiceRegistrar, srv BankServer) {
+	s.RegisterService(&Bank_ServiceDesc, srv)
+}
+
+func _Bank_OpenAccount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(OpenAccountRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).OpenAccount(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/OpenAccount",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).OpenAccount(ctx, req.(*OpenAccountRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Bank_CloseAccount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CloseAccountRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).CloseAccount(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/CloseAccount",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).CloseAccount(ctx, req.(*CloseAccountRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Bank_GetAccounts_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(emptypb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).GetAccounts(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/GetAccounts",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).GetAccounts(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Bank_GetTransactions_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(GetTransactionsRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(BankServer).GetTransactions(m, &bankGetTransactionsServer{stream})
+}
+
+type Bank_GetTransactionsServer interface {
+	Send(*Transaction) error
+	grpc.ServerStream
+}
+
+type bankGetTransactionsServer struct {
+	grpc.ServerStream
+}
+
+func (x *bankGetTransactionsServer) Send(m *Transaction) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _Bank_Deposit_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DepositRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).Deposit(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/Deposit",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).Deposit(ctx, req.(*DepositRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Bank_Withdraw_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(WithdrawRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).Withdraw(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/Withdraw",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).Withdraw(ctx, req.(*WithdrawRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Bank_Transfer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(TransferRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BankServer).Transfer(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Bank/Transfer",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BankServer).Transfer(ctx, req.(*TransferRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Bank_ServiceDesc is the grpc.ServiceDesc for Bank service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Bank_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Bank",
+	HandlerType: (*BankServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "OpenAccount",
+			Handler:    _Bank_OpenAccount_Handler,
+		},
+		{
+			MethodName: "CloseAccount",
+			Handler:    _Bank_CloseAccount_Handler,
+		},
+		{
+			MethodName: "GetAccounts",
+			Handler:    _Bank_GetAccounts_Handler,
+		},
+		{
+			MethodName: "Deposit",
+			Handler:    _Bank_Deposit_Handler,
+		},
+		{
+			MethodName: "Withdraw",
+			Handler:    _Bank_Withdraw_Handler,
+		},
+		{
+			MethodName: "Transfer",
+			Handler:    _Bank_Transfer_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "GetTransactions",
+			Handler:       _Bank_GetTransactions_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "bank.proto",
+}
diff --git a/internal/testing/cmd/bankdemo/chat.go b/internal/testing/cmd/bankdemo/chat.go
index b9721fa..0ff6e57 100644
--- a/internal/testing/cmd/bankdemo/chat.go
+++ b/internal/testing/cmd/bankdemo/chat.go
@@ -15,6 +15,7 @@ import (
 // a capability to connect customers and support agents in real-time
 // chat.
 type chatServer struct {
+	UnimplementedSupportServer
 	chatsBySession     map[string]*session
 	chatsAwaitingAgent []string
 	lastSession        int32
diff --git a/internal/testing/cmd/bankdemo/main.go b/internal/testing/cmd/bankdemo/main.go
index 91b634e..7a73864 100644
--- a/internal/testing/cmd/bankdemo/main.go
+++ b/internal/testing/cmd/bankdemo/main.go
@@ -1,6 +1,6 @@
 package main
 
-//go:generate protoc --go_out=plugins=grpc:./ bank.proto support.proto
+//go:generate protoc --go_out=. --go-grpc_out=. bank.proto support.proto
 
 import (
 	"context"
diff --git a/internal/testing/cmd/bankdemo/support.pb.go b/internal/testing/cmd/bankdemo/support.pb.go
index f03d323..b3c985a 100644
--- a/internal/testing/cmd/bankdemo/support.pb.go
+++ b/internal/testing/cmd/bankdemo/support.pb.go
@@ -1,17 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0-devel
-// 	protoc        v3.14.0
+// 	protoc        v4.22.0
 // source: support.proto
 
 package main
 
 import (
-	context "context"
 	proto "github.com/golang/protobuf/proto"
-	grpc "google.golang.org/grpc"
-	codes "google.golang.org/grpc/codes"
-	status "google.golang.org/grpc/status"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
@@ -79,6 +75,7 @@ type ChatCustomerRequest struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Req:
+	//
 	//	*ChatCustomerRequest_Init
 	//	*ChatCustomerRequest_Msg
 	//	*ChatCustomerRequest_HangUp
@@ -286,6 +283,7 @@ type ChatCustomerResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Resp:
+	//
 	//	*ChatCustomerResponse_Session
 	//	*ChatCustomerResponse_Msg
 	Resp isChatCustomerResponse_Resp `protobuf_oneof:"resp"`
@@ -371,6 +369,7 @@ type ChatAgentRequest struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Req:
+	//
 	//	*ChatAgentRequest_Accept
 	//	*ChatAgentRequest_Msg
 	//	*ChatAgentRequest_LeaveSession
@@ -524,6 +523,7 @@ type ChatEntry struct {
 
 	Date *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=date,proto3" json:"date,omitempty"`
 	// Types that are assignable to Entry:
+	//
 	//	*ChatEntry_CustomerMsg
 	//	*ChatEntry_AgentMsg
 	Entry isChatEntry_Entry `protobuf_oneof:"entry"`
@@ -611,6 +611,7 @@ type ChatAgentResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Resp:
+	//
 	//	*ChatAgentResponse_AcceptedSession
 	//	*ChatAgentResponse_Msg
 	//	*ChatAgentResponse_SessionEnded
@@ -1056,199 +1057,3 @@ func file_support_proto_init() {
 	file_support_proto_goTypes = nil
 	file_support_proto_depIdxs = nil
 }
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConnInterface
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
-
-// SupportClient is the client API for Support service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type SupportClient interface {
-	// ChatCustomer is used by a customer-facing app to send the customer's messages
-	// to a chat session. The customer is how initiates and terminates (via "hangup")
-	// a chat session. Only customers may invoke this method (e.g. requests must
-	// include customer auth credentials).
-	ChatCustomer(ctx context.Context, opts ...grpc.CallOption) (Support_ChatCustomerClient, error)
-	// ChatAgent is used by an agent-facing app to allow an agent to reply to a
-	// customer's messages in a chat session. The agent may accept a chat session,
-	// which defaults to the session awaiting an agent for the longest period of time
-	// (FIFO queue).
-	ChatAgent(ctx context.Context, opts ...grpc.CallOption) (Support_ChatAgentClient, error)
-}
-
-type supportClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewSupportClient(cc grpc.ClientConnInterface) SupportClient {
-	return &supportClient{cc}
-}
-
-func (c *supportClient) ChatCustomer(ctx context.Context, opts ...grpc.CallOption) (Support_ChatCustomerClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Support_serviceDesc.Streams[0], "/Support/ChatCustomer", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &supportChatCustomerClient{stream}
-	return x, nil
-}
-
-type Support_ChatCustomerClient interface {
-	Send(*ChatCustomerRequest) error
-	Recv() (*ChatCustomerResponse, error)
-	grpc.ClientStream
-}
-
-type supportChatCustomerClient struct {
-	grpc.ClientStream
-}
-
-func (x *supportChatCustomerClient) Send(m *ChatCustomerRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *supportChatCustomerClient) Recv() (*ChatCustomerResponse, error) {
-	m := new(ChatCustomerResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func (c *supportClient) ChatAgent(ctx context.Context, opts ...grpc.CallOption) (Support_ChatAgentClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Support_serviceDesc.Streams[1], "/Support/ChatAgent", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &supportChatAgentClient{stream}
-	return x, nil
-}
-
-type Support_ChatAgentClient interface {
-	Send(*ChatAgentRequest) error
-	Recv() (*ChatAgentResponse, error)
-	grpc.ClientStream
-}
-
-type supportChatAgentClient struct {
-	grpc.ClientStream
-}
-
-func (x *supportChatAgentClient) Send(m *ChatAgentRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *supportChatAgentClient) Recv() (*ChatAgentResponse, error) {
-	m := new(ChatAgentResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// SupportServer is the server API for Support service.
-type SupportServer interface {
-	// ChatCustomer is used by a customer-facing app to send the customer's messages
-	// to a chat session. The customer is how initiates and terminates (via "hangup")
-	// a chat session. Only customers may invoke this method (e.g. requests must
-	// include customer auth credentials).
-	ChatCustomer(Support_ChatCustomerServer) error
-	// ChatAgent is used by an agent-facing app to allow an agent to reply to a
-	// customer's messages in a chat session. The agent may accept a chat session,
-	// which defaults to the session awaiting an agent for the longest period of time
-	// (FIFO queue).
-	ChatAgent(Support_ChatAgentServer) error
-}
-
-// UnimplementedSupportServer can be embedded to have forward compatible implementations.
-type UnimplementedSupportServer struct {
-}
-
-func (*UnimplementedSupportServer) ChatCustomer(Support_ChatCustomerServer) error {
-	return status.Errorf(codes.Unimplemented, "method ChatCustomer not implemented")
-}
-func (*UnimplementedSupportServer) ChatAgent(Support_ChatAgentServer) error {
-	return status.Errorf(codes.Unimplemented, "method ChatAgent not implemented")
-}
-
-func RegisterSupportServer(s *grpc.Server, srv SupportServer) {
-	s.RegisterService(&_Support_serviceDesc, srv)
-}
-
-func _Support_ChatCustomer_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(SupportServer).ChatCustomer(&supportChatCustomerServer{stream})
-}
-
-type Support_ChatCustomerServer interface {
-	Send(*ChatCustomerResponse) error
-	Recv() (*ChatCustomerRequest, error)
-	grpc.ServerStream
-}
-
-type supportChatCustomerServer struct {
-	grpc.ServerStream
-}
-
-func (x *supportChatCustomerServer) Send(m *ChatCustomerResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *supportChatCustomerServer) Recv() (*ChatCustomerRequest, error) {
-	m := new(ChatCustomerRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func _Support_ChatAgent_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(SupportServer).ChatAgent(&supportChatAgentServer{stream})
-}
-
-type Support_ChatAgentServer interface {
-	Send(*ChatAgentResponse) error
-	Recv() (*ChatAgentRequest, error)
-	grpc.ServerStream
-}
-
-type supportChatAgentServer struct {
-	grpc.ServerStream
-}
-
-func (x *supportChatAgentServer) Send(m *ChatAgentResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *supportChatAgentServer) Recv() (*ChatAgentRequest, error) {
-	m := new(ChatAgentRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _Support_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "Support",
-	HandlerType: (*SupportServer)(nil),
-	Methods:     []grpc.MethodDesc{},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "ChatCustomer",
-			Handler:       _Support_ChatCustomer_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "ChatAgent",
-			Handler:       _Support_ChatAgent_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "support.proto",
-}
diff --git a/internal/testing/cmd/bankdemo/support_grpc.pb.go b/internal/testing/cmd/bankdemo/support_grpc.pb.go
new file mode 100644
index 0000000..cf84a45
--- /dev/null
+++ b/internal/testing/cmd/bankdemo/support_grpc.pb.go
@@ -0,0 +1,217 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package main
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// SupportClient is the client API for Support service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type SupportClient interface {
+	// ChatCustomer is used by a customer-facing app to send the customer's messages
+	// to a chat session. The customer is how initiates and terminates (via "hangup")
+	// a chat session. Only customers may invoke this method (e.g. requests must
+	// include customer auth credentials).
+	ChatCustomer(ctx context.Context, opts ...grpc.CallOption) (Support_ChatCustomerClient, error)
+	// ChatAgent is used by an agent-facing app to allow an agent to reply to a
+	// customer's messages in a chat session. The agent may accept a chat session,
+	// which defaults to the session awaiting an agent for the longest period of time
+	// (FIFO queue).
+	ChatAgent(ctx context.Context, opts ...grpc.CallOption) (Support_ChatAgentClient, error)
+}
+
+type supportClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewSupportClient(cc grpc.ClientConnInterface) SupportClient {
+	return &supportClient{cc}
+}
+
+func (c *supportClient) ChatCustomer(ctx context.Context, opts ...grpc.CallOption) (Support_ChatCustomerClient, error) {
+	stream, err := c.cc.NewStream(ctx, &Support_ServiceDesc.Streams[0], "/Support/ChatCustomer", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &supportChatCustomerClient{stream}
+	return x, nil
+}
+
+type Support_ChatCustomerClient interface {
+	Send(*ChatCustomerRequest) error
+	Recv() (*ChatCustomerResponse, error)
+	grpc.ClientStream
+}
+
+type supportChatCustomerClient struct {
+	grpc.ClientStream
+}
+
+func (x *supportChatCustomerClient) Send(m *ChatCustomerRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *supportChatCustomerClient) Recv() (*ChatCustomerResponse, error) {
+	m := new(ChatCustomerResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *supportClient) ChatAgent(ctx context.Context, opts ...grpc.CallOption) (Support_ChatAgentClient, error) {
+	stream, err := c.cc.NewStream(ctx, &Support_ServiceDesc.Streams[1], "/Support/ChatAgent", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &supportChatAgentClient{stream}
+	return x, nil
+}
+
+type Support_ChatAgentClient interface {
+	Send(*ChatAgentRequest) error
+	Recv() (*ChatAgentResponse, error)
+	grpc.ClientStream
+}
+
+type supportChatAgentClient struct {
+	grpc.ClientStream
+}
+
+func (x *supportChatAgentClient) Send(m *ChatAgentRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *supportChatAgentClient) Recv() (*ChatAgentResponse, error) {
+	m := new(ChatAgentResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// SupportServer is the server API for Support service.
+// All implementations must embed UnimplementedSupportServer
+// for forward compatibility
+type SupportServer interface {
+	// ChatCustomer is used by a customer-facing app to send the customer's messages
+	// to a chat session. The customer is how initiates and terminates (via "hangup")
+	// a chat session. Only customers may invoke this method (e.g. requests must
+	// include customer auth credentials).
+	ChatCustomer(Support_ChatCustomerServer) error
+	// ChatAgent is used by an agent-facing app to allow an agent to reply to a
+	// customer's messages in a chat session. The agent may accept a chat session,
+	// which defaults to the session awaiting an agent for the longest period of time
+	// (FIFO queue).
+	ChatAgent(Support_ChatAgentServer) error
+	mustEmbedUnimplementedSupportServer()
+}
+
+// UnimplementedSupportServer must be embedded to have forward compatible implementations.
+type UnimplementedSupportServer struct {
+}
+
+func (UnimplementedSupportServer) ChatCustomer(Support_ChatCustomerServer) error {
+	return status.Errorf(codes.Unimplemented, "method ChatCustomer not implemented")
+}
+func (UnimplementedSupportServer) ChatAgent(Support_ChatAgentServer) error {
+	return status.Errorf(codes.Unimplemented, "method ChatAgent not implemented")
+}
+func (UnimplementedSupportServer) mustEmbedUnimplementedSupportServer() {}
+
+// UnsafeSupportServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to SupportServer will
+// result in compilation errors.
+type UnsafeSupportServer interface {
+	mustEmbedUnimplementedSupportServer()
+}
+
+func RegisterSupportServer(s grpc.ServiceRegistrar, srv SupportServer) {
+	s.RegisterService(&Support_ServiceDesc, srv)
+}
+
+func _Support_ChatCustomer_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(SupportServer).ChatCustomer(&supportChatCustomerServer{stream})
+}
+
+type Support_ChatCustomerServer interface {
+	Send(*ChatCustomerResponse) error
+	Recv() (*ChatCustomerRequest, error)
+	grpc.ServerStream
+}
+
+type supportChatCustomerServer struct {
+	grpc.ServerStream
+}
+
+func (x *supportChatCustomerServer) Send(m *ChatCustomerResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *supportChatCustomerServer) Recv() (*ChatCustomerRequest, error) {
+	m := new(ChatCustomerRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _Support_ChatAgent_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(SupportServer).ChatAgent(&supportChatAgentServer{stream})
+}
+
+type Support_ChatAgentServer interface {
+	Send(*ChatAgentResponse) error
+	Recv() (*ChatAgentRequest, error)
+	grpc.ServerStream
+}
+
+type supportChatAgentServer struct {
+	grpc.ServerStream
+}
+
+func (x *supportChatAgentServer) Send(m *ChatAgentResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *supportChatAgentServer) Recv() (*ChatAgentRequest, error) {
+	m := new(ChatAgentRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Support_ServiceDesc is the grpc.ServiceDesc for Support service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Support_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Support",
+	HandlerType: (*SupportServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ChatCustomer",
+			Handler:       _Support_ChatCustomer_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "ChatAgent",
+			Handler:       _Support_ChatAgent_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "support.proto",
+}
diff --git a/internal/testing/cmd/testserver/unix.go b/internal/testing/cmd/testserver/unix.go
index 9dfa5fa..8fc45dc 100644
--- a/internal/testing/cmd/testserver/unix.go
+++ b/internal/testing/cmd/testserver/unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package main
diff --git a/internal/testing/example.protoset b/internal/testing/example.protoset
index c2da1ae..dff77a8 100644
Binary files a/internal/testing/example.protoset and b/internal/testing/example.protoset differ
diff --git a/internal/testing/test.pb.go b/internal/testing/test.pb.go
index 2095469..907762f 100644
--- a/internal/testing/test.pb.go
+++ b/internal/testing/test.pb.go
@@ -20,17 +20,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0-devel
-// 	protoc        v3.14.0
+// 	protoc        v4.22.0
 // source: test.proto
 
 package testing
 
 import (
-	context "context"
 	proto "github.com/golang/protobuf/proto"
-	grpc "google.golang.org/grpc"
-	codes "google.golang.org/grpc/codes"
-	status "google.golang.org/grpc/status"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -1032,491 +1028,3 @@ func file_test_proto_init() {
 	file_test_proto_goTypes = nil
 	file_test_proto_depIdxs = nil
 }
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConnInterface
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
-
-// TestServiceClient is the client API for TestService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type TestServiceClient interface {
-	// One empty request followed by one empty response.
-	EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
-	// One request followed by one response.
-	// The server returns the client payload as-is.
-	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
-	// One request followed by a sequence of responses (streamed download).
-	// The server returns the payload with client desired type and sizes.
-	StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error)
-	// A sequence of requests followed by one response (streamed upload).
-	// The server returns the aggregated size of client payload as the result.
-	StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error)
-	// A sequence of requests with each request served by the server immediately.
-	// As one request could lead to multiple responses, this interface
-	// demonstrates the idea of full duplexing.
-	FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error)
-	// A sequence of requests followed by a sequence of responses.
-	// The server buffers all the client requests and then serves them in order. A
-	// stream of responses are returned to the client when the server starts with
-	// first request.
-	HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error)
-}
-
-type testServiceClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
-	return &testServiceClient{cc}
-}
-
-func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
-	out := new(Empty)
-	err := c.cc.Invoke(ctx, "/testing.TestService/EmptyCall", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
-	out := new(SimpleResponse)
-	err := c.cc.Invoke(ctx, "/testing.TestService/UnaryCall", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[0], "/testing.TestService/StreamingOutputCall", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &testServiceStreamingOutputCallClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
-	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	return x, nil
-}
-
-type TestService_StreamingOutputCallClient interface {
-	Recv() (*StreamingOutputCallResponse, error)
-	grpc.ClientStream
-}
-
-type testServiceStreamingOutputCallClient struct {
-	grpc.ClientStream
-}
-
-func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallResponse, error) {
-	m := new(StreamingOutputCallResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[1], "/testing.TestService/StreamingInputCall", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &testServiceStreamingInputCallClient{stream}
-	return x, nil
-}
-
-type TestService_StreamingInputCallClient interface {
-	Send(*StreamingInputCallRequest) error
-	CloseAndRecv() (*StreamingInputCallResponse, error)
-	grpc.ClientStream
-}
-
-type testServiceStreamingInputCallClient struct {
-	grpc.ClientStream
-}
-
-func (x *testServiceStreamingInputCallClient) Send(m *StreamingInputCallRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCallResponse, error) {
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	m := new(StreamingInputCallResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[2], "/testing.TestService/FullDuplexCall", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &testServiceFullDuplexCallClient{stream}
-	return x, nil
-}
-
-type TestService_FullDuplexCallClient interface {
-	Send(*StreamingOutputCallRequest) error
-	Recv() (*StreamingOutputCallResponse, error)
-	grpc.ClientStream
-}
-
-type testServiceFullDuplexCallClient struct {
-	grpc.ClientStream
-}
-
-func (x *testServiceFullDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
-	m := new(StreamingOutputCallResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[3], "/testing.TestService/HalfDuplexCall", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &testServiceHalfDuplexCallClient{stream}
-	return x, nil
-}
-
-type TestService_HalfDuplexCallClient interface {
-	Send(*StreamingOutputCallRequest) error
-	Recv() (*StreamingOutputCallResponse, error)
-	grpc.ClientStream
-}
-
-type testServiceHalfDuplexCallClient struct {
-	grpc.ClientStream
-}
-
-func (x *testServiceHalfDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
-	m := new(StreamingOutputCallResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// TestServiceServer is the server API for TestService service.
-type TestServiceServer interface {
-	// One empty request followed by one empty response.
-	EmptyCall(context.Context, *Empty) (*Empty, error)
-	// One request followed by one response.
-	// The server returns the client payload as-is.
-	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
-	// One request followed by a sequence of responses (streamed download).
-	// The server returns the payload with client desired type and sizes.
-	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
-	// A sequence of requests followed by one response (streamed upload).
-	// The server returns the aggregated size of client payload as the result.
-	StreamingInputCall(TestService_StreamingInputCallServer) error
-	// A sequence of requests with each request served by the server immediately.
-	// As one request could lead to multiple responses, this interface
-	// demonstrates the idea of full duplexing.
-	FullDuplexCall(TestService_FullDuplexCallServer) error
-	// A sequence of requests followed by a sequence of responses.
-	// The server buffers all the client requests and then serves them in order. A
-	// stream of responses are returned to the client when the server starts with
-	// first request.
-	HalfDuplexCall(TestService_HalfDuplexCallServer) error
-}
-
-// UnimplementedTestServiceServer can be embedded to have forward compatible implementations.
-type UnimplementedTestServiceServer struct {
-}
-
-func (*UnimplementedTestServiceServer) EmptyCall(context.Context, *Empty) (*Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
-}
-func (*UnimplementedTestServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingInputCall(TestService_StreamingInputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) FullDuplexCall(TestService_FullDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
-}
-func (*UnimplementedTestServiceServer) HalfDuplexCall(TestService_HalfDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
-}
-
-func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
-	s.RegisterService(&_TestService_serviceDesc, srv)
-}
-
-func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Empty)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(TestServiceServer).EmptyCall(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/testing.TestService/EmptyCall",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(SimpleRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(TestServiceServer).UnaryCall(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/testing.TestService/UnaryCall",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(StreamingOutputCallRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
-}
-
-type TestService_StreamingOutputCallServer interface {
-	Send(*StreamingOutputCallResponse) error
-	grpc.ServerStream
-}
-
-type testServiceStreamingOutputCallServer struct {
-	grpc.ServerStream
-}
-
-func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
-}
-
-type TestService_StreamingInputCallServer interface {
-	SendAndClose(*StreamingInputCallResponse) error
-	Recv() (*StreamingInputCallRequest, error)
-	grpc.ServerStream
-}
-
-type testServiceStreamingInputCallServer struct {
-	grpc.ServerStream
-}
-
-func (x *testServiceStreamingInputCallServer) SendAndClose(m *StreamingInputCallResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest, error) {
-	m := new(StreamingInputCallRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
-}
-
-type TestService_FullDuplexCallServer interface {
-	Send(*StreamingOutputCallResponse) error
-	Recv() (*StreamingOutputCallRequest, error)
-	grpc.ServerStream
-}
-
-type testServiceFullDuplexCallServer struct {
-	grpc.ServerStream
-}
-
-func (x *testServiceFullDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
-	m := new(StreamingOutputCallRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
-}
-
-type TestService_HalfDuplexCallServer interface {
-	Send(*StreamingOutputCallResponse) error
-	Recv() (*StreamingOutputCallRequest, error)
-	grpc.ServerStream
-}
-
-type testServiceHalfDuplexCallServer struct {
-	grpc.ServerStream
-}
-
-func (x *testServiceHalfDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
-	m := new(StreamingOutputCallRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _TestService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "testing.TestService",
-	HandlerType: (*TestServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "EmptyCall",
-			Handler:    _TestService_EmptyCall_Handler,
-		},
-		{
-			MethodName: "UnaryCall",
-			Handler:    _TestService_UnaryCall_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "StreamingOutputCall",
-			Handler:       _TestService_StreamingOutputCall_Handler,
-			ServerStreams: true,
-		},
-		{
-			StreamName:    "StreamingInputCall",
-			Handler:       _TestService_StreamingInputCall_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "FullDuplexCall",
-			Handler:       _TestService_FullDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "HalfDuplexCall",
-			Handler:       _TestService_HalfDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "test.proto",
-}
-
-// UnimplementedServiceClient is the client API for UnimplementedService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type UnimplementedServiceClient interface {
-	// A call that no server should implement
-	UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
-}
-
-type unimplementedServiceClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewUnimplementedServiceClient(cc grpc.ClientConnInterface) UnimplementedServiceClient {
-	return &unimplementedServiceClient{cc}
-}
-
-func (c *unimplementedServiceClient) UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
-	out := new(Empty)
-	err := c.cc.Invoke(ctx, "/testing.UnimplementedService/UnimplementedCall", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-// UnimplementedServiceServer is the server API for UnimplementedService service.
-type UnimplementedServiceServer interface {
-	// A call that no server should implement
-	UnimplementedCall(context.Context, *Empty) (*Empty, error)
-}
-
-// UnimplementedUnimplementedServiceServer can be embedded to have forward compatible implementations.
-type UnimplementedUnimplementedServiceServer struct {
-}
-
-func (*UnimplementedUnimplementedServiceServer) UnimplementedCall(context.Context, *Empty) (*Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnimplementedCall not implemented")
-}
-
-func RegisterUnimplementedServiceServer(s *grpc.Server, srv UnimplementedServiceServer) {
-	s.RegisterService(&_UnimplementedService_serviceDesc, srv)
-}
-
-func _UnimplementedService_UnimplementedCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Empty)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/testing.UnimplementedService/UnimplementedCall",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, req.(*Empty))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _UnimplementedService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "testing.UnimplementedService",
-	HandlerType: (*UnimplementedServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "UnimplementedCall",
-			Handler:    _UnimplementedService_UnimplementedCall_Handler,
-		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "test.proto",
-}
diff --git a/internal/testing/test_grpc.pb.go b/internal/testing/test_grpc.pb.go
new file mode 100644
index 0000000..1d0fe8f
--- /dev/null
+++ b/internal/testing/test_grpc.pb.go
@@ -0,0 +1,523 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package testing
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// TestServiceClient is the client API for TestService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type TestServiceClient interface {
+	// One empty request followed by one empty response.
+	EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error)
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error)
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error)
+}
+
+type testServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
+	out := new(Empty)
+	err := c.cc.Invoke(ctx, "/testing.TestService/EmptyCall", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := c.cc.Invoke(ctx, "/testing.TestService/UnaryCall", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
+	stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[0], "/testing.TestService/StreamingOutputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingOutputCallClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type TestService_StreamingOutputCallClient interface {
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingOutputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
+	stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[1], "/testing.TestService/StreamingInputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingInputCallClient{stream}
+	return x, nil
+}
+
+type TestService_StreamingInputCallClient interface {
+	Send(*StreamingInputCallRequest) error
+	CloseAndRecv() (*StreamingInputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingInputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingInputCallClient) Send(m *StreamingInputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCallResponse, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(StreamingInputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
+	stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[2], "/testing.TestService/FullDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceFullDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_FullDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceFullDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceFullDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
+	stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[3], "/testing.TestService/HalfDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceHalfDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_HalfDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceHalfDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceHalfDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// TestServiceServer is the server API for TestService service.
+// All implementations must embed UnimplementedTestServiceServer
+// for forward compatibility
+type TestServiceServer interface {
+	// One empty request followed by one empty response.
+	EmptyCall(context.Context, *Empty) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(TestService_HalfDuplexCallServer) error
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+// UnimplementedTestServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedTestServiceServer struct {
+}
+
+func (UnimplementedTestServiceServer) EmptyCall(context.Context, *Empty) (*Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
+}
+func (UnimplementedTestServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
+}
+func (UnimplementedTestServiceServer) StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error {
+	return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
+}
+func (UnimplementedTestServiceServer) StreamingInputCall(TestService_StreamingInputCallServer) error {
+	return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
+}
+func (UnimplementedTestServiceServer) FullDuplexCall(TestService_FullDuplexCallServer) error {
+	return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
+}
+func (UnimplementedTestServiceServer) HalfDuplexCall(TestService_HalfDuplexCallServer) error {
+	return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
+}
+func (UnimplementedTestServiceServer) mustEmbedUnimplementedTestServiceServer() {}
+
+// UnsafeTestServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to TestServiceServer will
+// result in compilation errors.
+type UnsafeTestServiceServer interface {
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+func RegisterTestServiceServer(s grpc.ServiceRegistrar, srv TestServiceServer) {
+	s.RegisterService(&TestService_ServiceDesc, srv)
+}
+
+func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).EmptyCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/testing.TestService/EmptyCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/testing.TestService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(StreamingOutputCallRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+
+type TestService_StreamingOutputCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	grpc.ServerStream
+}
+
+type testServiceStreamingOutputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+
+type TestService_StreamingInputCallServer interface {
+	SendAndClose(*StreamingInputCallResponse) error
+	Recv() (*StreamingInputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceStreamingInputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingInputCallServer) SendAndClose(m *StreamingInputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest, error) {
+	m := new(StreamingInputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+
+type TestService_FullDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceFullDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceFullDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
+}
+
+type TestService_HalfDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceHalfDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceHalfDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// TestService_ServiceDesc is the grpc.ServiceDesc for TestService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var TestService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "testing.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "EmptyCall",
+			Handler:    _TestService_EmptyCall_Handler,
+		},
+		{
+			MethodName: "UnaryCall",
+			Handler:    _TestService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingOutputCall",
+			Handler:       _TestService_StreamingOutputCall_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "StreamingInputCall",
+			Handler:       _TestService_StreamingInputCall_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "FullDuplexCall",
+			Handler:       _TestService_FullDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "HalfDuplexCall",
+			Handler:       _TestService_HalfDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+// UnimplementedServiceClient is the client API for UnimplementedService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type UnimplementedServiceClient interface {
+	// A call that no server should implement
+	UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
+}
+
+type unimplementedServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewUnimplementedServiceClient(cc grpc.ClientConnInterface) UnimplementedServiceClient {
+	return &unimplementedServiceClient{cc}
+}
+
+func (c *unimplementedServiceClient) UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
+	out := new(Empty)
+	err := c.cc.Invoke(ctx, "/testing.UnimplementedService/UnimplementedCall", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// UnimplementedServiceServer is the server API for UnimplementedService service.
+// All implementations must embed UnimplementedUnimplementedServiceServer
+// for forward compatibility
+type UnimplementedServiceServer interface {
+	// A call that no server should implement
+	UnimplementedCall(context.Context, *Empty) (*Empty, error)
+	mustEmbedUnimplementedUnimplementedServiceServer()
+}
+
+// UnimplementedUnimplementedServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedUnimplementedServiceServer struct {
+}
+
+func (UnimplementedUnimplementedServiceServer) UnimplementedCall(context.Context, *Empty) (*Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method UnimplementedCall not implemented")
+}
+func (UnimplementedUnimplementedServiceServer) mustEmbedUnimplementedUnimplementedServiceServer() {}
+
+// UnsafeUnimplementedServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to UnimplementedServiceServer will
+// result in compilation errors.
+type UnsafeUnimplementedServiceServer interface {
+	mustEmbedUnimplementedUnimplementedServiceServer()
+}
+
+func RegisterUnimplementedServiceServer(s grpc.ServiceRegistrar, srv UnimplementedServiceServer) {
+	s.RegisterService(&UnimplementedService_ServiceDesc, srv)
+}
+
+func _UnimplementedService_UnimplementedCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/testing.UnimplementedService/UnimplementedCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// UnimplementedService_ServiceDesc is the grpc.ServiceDesc for UnimplementedService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var UnimplementedService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "testing.UnimplementedService",
+	HandlerType: (*UnimplementedServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnimplementedCall",
+			Handler:    _UnimplementedService_UnimplementedCall_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "test.proto",
+}
diff --git a/internal/testing/test_server.go b/internal/testing/test_server.go
index f96eea0..d50db0e 100644
--- a/internal/testing/test_server.go
+++ b/internal/testing/test_server.go
@@ -1,6 +1,6 @@
 package testing
 
-//go:generate protoc --go_out=plugins=grpc:./ test.proto
+//go:generate protoc --go_out=. --go-grpc_out=. test.proto
 //go:generate protoc --descriptor_set_out=./test.protoset test.proto
 //go:generate protoc --descriptor_set_out=./example.protoset --include_imports example.proto
 
@@ -19,7 +19,9 @@ import (
 )
 
 // TestServer implements the TestService interface defined in example.proto.
-type TestServer struct{}
+type TestServer struct {
+	UnimplementedTestServiceServer
+}
 
 // EmptyCall accepts one empty request and issues one empty response.
 func (TestServer) EmptyCall(ctx context.Context, req *Empty) (*Empty, error) {
diff --git a/invoke.go b/invoke.go
index b5bae4b..193c285 100644
--- a/invoke.go
+++ b/invoke.go
@@ -264,8 +264,10 @@ func invokeServerStream(ctx context.Context, stub grpcdynamic.Stub, md *desc.Met
 	// Now we can actually invoke the RPC!
 	str, err := stub.InvokeRpcServerStream(ctx, md, req)
 
-	if respHeaders, err := str.Header(); err == nil {
-		handler.OnReceiveHeaders(respHeaders)
+	if str != nil {
+		if respHeaders, err := str.Header(); err == nil {
+			handler.OnReceiveHeaders(respHeaders)
+		}
 	}
 
 	// Download each response message
@@ -288,7 +290,9 @@ func invokeServerStream(ctx context.Context, stub grpcdynamic.Stub, md *desc.Met
 		return fmt.Errorf("grpc call for %q failed: %v", md.GetFullyQualifiedName(), err)
 	}
 
-	handler.OnReceiveTrailers(stat, str.Trailer())
+	if str != nil {
+		handler.OnReceiveTrailers(stat, str.Trailer())
+	}
 
 	return nil
 }
diff --git a/tls_settings_test.go b/tls_settings_test.go
index bd96482..b12a251 100644
--- a/tls_settings_test.go
+++ b/tls_settings_test.go
@@ -170,8 +170,8 @@ func TestBrokenTLS_ServerPlainText(t *testing.T) {
 
 	e, err := createTestServerAndClient(nil, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
 	if !strings.Contains(err.Error(), "first record does not look like a TLS handshake") {
 		t.Fatalf("expecting TLS handshake failure, got: %v", err)
@@ -190,8 +190,8 @@ func TestBrokenTLS_ServerUsesWrongCert(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
 	if !strings.Contains(err.Error(), "certificate is valid for") {
 		t.Fatalf("expecting TLS certificate error, got: %v", err)
@@ -210,10 +210,10 @@ func TestBrokenTLS_ClientHasExpiredCert(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
-	if !strings.Contains(err.Error(), "bad certificate") {
+	if !strings.Contains(err.Error(), "certificate") {
 		t.Fatalf("expecting TLS certificate error, got: %v", err)
 	}
 }
@@ -230,8 +230,8 @@ func TestBrokenTLS_ServerHasExpiredCert(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
 	if !strings.Contains(err.Error(), "certificate has expired or is not yet valid") {
 		t.Fatalf("expecting TLS certificate expired, got: %v", err)
@@ -250,8 +250,8 @@ func TestBrokenTLS_ClientNotTrusted(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
 	if !strings.Contains(err.Error(), "bad certificate") {
 		t.Fatalf("expecting TLS certificate error, got: %v", err)
@@ -270,10 +270,10 @@ func TestBrokenTLS_ServerNotTrusted(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
-	if !strings.Contains(err.Error(), "certificate signed by unknown authority") {
+	if !strings.Contains(err.Error(), "certificate") {
 		t.Fatalf("expecting TLS certificate error, got: %v", err)
 	}
 }
@@ -290,8 +290,8 @@ func TestBrokenTLS_RequireClientCertButNonePresented(t *testing.T) {
 
 	e, err := createTestServerAndClient(serverCreds, clientCreds)
 	if err == nil {
-		t.Fatal("expecting TLS failure setting up server and client")
 		e.Close()
+		t.Fatal("expecting TLS failure setting up server and client")
 	}
 	if !strings.Contains(err.Error(), "bad certificate") {
 		t.Fatalf("expecting TLS certificate error, got: %v", err)
@@ -349,7 +349,7 @@ type testEnv struct {
 	cc  *grpc.ClientConn
 }
 
-func (e testEnv) Close() {
+func (e *testEnv) Close() {
 	if e.cc != nil {
 		e.cc.Close()
 		e.cc = nil