code: public void send(Context context, String text, ResponseListener listener) {
          setContext(context);
          super.send(text, listener);
      }
docs: Send this resource request asynchronously, with the given string as the request body.
  If no Content-Type header was set, this method will set it to "text/plain".
  
  @param context   The context that will be passed to authentication listener.
  @param text      The text to put in the request body
  @param listener  The listener whose onSuccess or onFailure methods will be called when this request finishes