code: public MessageStatus publish( String channelName, Object message )
    {
      return publish( channelName, message, new PublishOptions() );
    }
docs: Publishes message to specified channel. The message is not a push notification, it does not have any headers and
  does not go into any subtopics.
  
  @param channelName name of a channel to publish the message to. If the channel does not exist, Backendless
  automatically creates it.
  @param message     object to publish. The object can be of any data type - a primitive value, String, Date, a
  user-defined complex type, a collection or an array of these types.
  @return ${@link com.backendless.messaging.MessageStatus} - a data structure which contains ID of the published
  message and the status of the publish operation.
  @throws BackendlessException