/**
  * {@inheritdoc}
  */
 protected function createPayload()
 {
     $payload = new ChannelsSetPurposePayload();
     $payload->setChannelId('C1234567');
     $payload->setPurpose('new_purpose');
     return $payload;
 }
 /**
  * @return ChannelsSetPurposePayload
  */
 protected function createPayload()
 {
     $payload = new ChannelsSetPurposePayload();
     $payload->setChannelId($this->input->getArgument('channel-id'));
     $payload->setPurpose($this->input->getArgument('purpose'));
     return $payload;
 }