--- /dev/null
+// Copyright 2017 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 = "proto2";
+
+package grpc.testing;
+
+import "proto2.proto";
+import "test.proto";
+
+extend ToBeExtended {
+ optional int32 foo = 13;
+ optional Extension bar = 17;
+ optional SearchRequest baz = 19;
+}
+
+message Extension {
+ optional int32 whatzit = 1;
+}