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diff --git a/src/cpp/server/channelz/channelz_service.h b/src/cpp/server/channelz/channelz_service.h
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+++ b/src/cpp/server/channelz/channelz_service.h
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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.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CPP_SERVER_CHANNELZ_SERVICE_H
+#define GRPC_INTERNAL_CPP_SERVER_CHANNELZ_SERVICE_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpcpp/grpcpp.h>
+#include "src/proto/grpc/channelz/channelz.grpc.pb.h"
+
+namespace grpc {
+
+class ChannelzService final : public channelz::v1::Channelz::Service {
+ private:
+  // implementation of GetTopChannels rpc
+  Status GetTopChannels(
+      ServerContext* unused, const channelz::v1::GetTopChannelsRequest* request,
+      channelz::v1::GetTopChannelsResponse* response) override;
+  // implementation of GetChannel rpc
+  Status GetChannel(ServerContext* unused,
+                    const channelz::v1::GetChannelRequest* request,
+                    channelz::v1::GetChannelResponse* response) override;
+};
+
+}  // namespace grpc
+
+#endif  // GRPC_INTERNAL_CPP_SERVER_CHANNELZ_SERVICE_H