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diff --git a/examples/protos/keyvaluestore.proto b/examples/protos/keyvaluestore.proto
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+// Copyright 2018 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package keyvaluestore;
+
+// A simple key-value storage service
+service KeyValueStore {
+  // Provides a value for each key request
+  rpc GetValues (stream Request) returns (stream Response) {}
+}
+
+// The request message containing the key
+message Request {
+  string key = 1;
+}
+
+// The response message containing the value associated with the key
+message Response {
+  string value = 1;
+}