code: def display_message(pymux, variables):
      " Display a message. "
      message = variables['<message>']
      client_state = pymux.get_client_state()
      client_state.message = messagf display_message(pymux, variables):
      " Display a message. "
      message = variables['<message>']
      client_state = pymux.get_client_state()
      client_state.message = message
docs: Display a message.