/**
  * @return ChannelsSetTopicPayload
  */
 protected function createPayload()
 {
     $payload = new ChannelsSetTopicPayload();
     $payload->setChannelId($this->input->getArgument('channel-id'));
     $payload->setTopic($this->input->getArgument('topic'));
     return $payload;
 }
 /**
  * @inheritdoc
  */
 protected function createPayload()
 {
     $payload = new ChannelsSetTopicPayload();
     $payload->setChannelId('C1234567');
     $payload->setTopic('new_topic');
     return $payload;
 }