code: def display_message(self, cmd, get_text=False):
          
          if get_text:
              return self.cmd('display-message', '-p', cmd).stdout
          else:
              self.cmd('display-message', cmd)
docs: ``$ tmux display-message`` to the pane.
  
          Displays a message in target-client status line.
  
          Parameters
          ----------
          cmd : str
              Special parameters to request from pane.
          get_text : bool, optional
              Returns only text without displaying a message in
              target-client status line.
  
          Returns
          -------
          :class:`list`
          :class:`None`