from update import update

    
class Message:
    def update_model(self, model):
        raise NotImplementedError("This message does not implement update_model method")
    
    def reset(self):
        return True
        
        
class ClickMessage(Message):
    def __init__(self, event):
        event.stopPropagation();
        

def msg(message_class, params):
    def callback(event):
        message_instance = message_class(event, params)
        update.schedule(message_instance)
    return callback