code: public static void sendAttachmentText(final String text) {
  		dispatchConversationTask(new ConversationDispatchTask() {
  			@Override
  			protected boolean execute(Conversation conversation) {
  				CompoundMessage message = new CompoundMessage();
  				message.setBody(text);
  				message.setRead(true);
  				message.setHidden(true);
  				message.setSenderId(conversation.getPerson().getId());
  				message.setAssociatedFiles(null);
  				conversation.getMessageManager().sendMessage(message);
  				return true;
  			}
  		}, "send attachment text");
  	}
docs: Sends a text message to the server. This message will be visible in the conversation view on the server, but will
  not be shown in the client's Message Center.
  
  @param text The message you wish to send.