code: protected SendListener getSendListener()
     {
        if (tc.isEntryEnabled()) SibTr.entry(this, tc, "getSendListener");
        if (tc.isEntryEnabled()) SibTr.exit(this, tc, "getSendListener", sendListener);
        return sendListener;
     }
docs: Returns the send listener (if any) of this transmission.
  @return Returns the send listener (if any) of this transmission.