code: def set_action(self, action, message):
          
          self.extra_data["_action"] = action
          self.extra_data["_message"] = message
docs: Set the action to be taken for this object.
  
          Assign an special "action" to this object to be taken
          in consideration in Holding Pen. The widget is referred to
          by a string with the filename minus extension.
  
          A message is also needed to tell the user the action
          required in a textual way.
  
          :param action: name of the action to add (i.e. "approval")
          :type action: string
  
          :param message: message to show to the user
          :type message: string