code: public PubsubFuture<Topic> createTopic(final String project,
                                           final String topic) {
      return createTopic(canonicalTopic(project, topic));
    }
docs: Create a Pub/Sub topic.
  
  @param project The Google Cloud project.
  @param topic   The name of the topic to create.
  @return A future that is completed when this request is completed.