code: def post_message(self, message, duration=None, pause=True, style="info"):
          
          if not duration:
              if not self.message_duration:
                  duration = settings.DEFAULT_MESSAGE_DURATION
              else:
                  duration = self.message_duration
          js_utils.post_message(
              self.driver, message, duration, style=style)
          if pause:
              duration = float(duration) + 0.15
              time.sleep(float(duration))
docs: Post a message on the screen with Messenger.
              Arguments:
                  message: The message to display.
                  duration: The time until the message vanishes. (Default: 2.55s)
                  pause: If True, the program waits until the message completes.
                  style: "info", "success", or "error".
  
              You can also post messages by using =>
                  self.execute_script('Messenger().post("My Message")')