docs: public Topic getTopic(String topicId) throws Exception {
      // [START pubsub_get_topic]
      try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
        ProjectTopicName topicName = ProjectTopicName.of(projectId, topicId);
        Topic topic = topicAdminClient.getTopic(topicName);
        return topic;
      }
      // [END pubsub_get_topic]
    }