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diff --git a/examples/pubsub/publisher.cc b/examples/pubsub/publisher.cc
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--- a/examples/pubsub/publisher.cc
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-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <sstream>
-
-#include <grpc++/client_context.h>
-
-#include "examples/pubsub/publisher.h"
-
-using tech::pubsub::Topic;
-using tech::pubsub::DeleteTopicRequest;
-using tech::pubsub::GetTopicRequest;
-using tech::pubsub::PublisherService;
-using tech::pubsub::ListTopicsRequest;
-using tech::pubsub::ListTopicsResponse;
-using tech::pubsub::PublishRequest;
-using tech::pubsub::PubsubMessage;
-
-namespace grpc {
-namespace examples {
-namespace pubsub {
-
-Publisher::Publisher(std::shared_ptr<ChannelInterface> channel)
-    : stub_(PublisherService::NewStub(channel)) {}
-
-void Publisher::Shutdown() { stub_.reset(); }
-
-Status Publisher::CreateTopic(const grpc::string& topic) {
-  Topic request;
-  Topic response;
-  request.set_name(topic);
-  ClientContext context;
-
-  return stub_->CreateTopic(&context, request, &response);
-}
-
-Status Publisher::ListTopics(const grpc::string& project_id,
-                             std::vector<grpc::string>* topics) {
-  ListTopicsRequest request;
-  ListTopicsResponse response;
-  ClientContext context;
-
-  std::ostringstream ss;
-  ss << "cloud.googleapis.com/project in (/projects/" << project_id << ")";
-  request.set_query(ss.str());
-
-  Status s = stub_->ListTopics(&context, request, &response);
-
-  tech::pubsub::Topic topic;
-  for (int i = 0; i < response.topic_size(); i++) {
-    topic = response.topic(i);
-    topics->push_back(topic.name());
-  }
-
-  return s;
-}
-
-Status Publisher::GetTopic(const grpc::string& topic) {
-  GetTopicRequest request;
-  Topic response;
-  ClientContext context;
-
-  request.set_topic(topic);
-
-  return stub_->GetTopic(&context, request, &response);
-}
-
-Status Publisher::DeleteTopic(const grpc::string& topic) {
-  DeleteTopicRequest request;
-  proto2::Empty response;
-  ClientContext context;
-
-  request.set_topic(topic);
-
-  return stub_->DeleteTopic(&context, request, &response);
-}
-
-Status Publisher::Publish(const grpc::string& topic, const grpc::string& data) {
-  PublishRequest request;
-  proto2::Empty response;
-  ClientContext context;
-
-  request.mutable_message()->set_data(data);
-  request.set_topic(topic);
-
-  return stub_->Publish(&context, request, &response);
-}
-
-}  // namespace pubsub
-}  // namespace examples
-}  // namespace grpc