sendMessage 
  Sends a message to the server.
Return
The Result object containing an instance of Message in the case of a successful upload or a failure if the upload had failed.
Parameters
channelType 
The type of the channel to which the message is sent.
channelId 
The ID of the channel to which the message is sent.
message
The message to be sent.
See also
Result.Success 
Result.Failure