Trigger action.

        :param action:
        :param args:
        :return:

async def trigger(self, action, args):
        """
        Trigger action.

        :param action:
        :param args:
        :return:
        """
        handler_name = f"on_{action}"
        handler = getattr(self, handler_name, None)
        if not handler:
            return None
        await handler(*args)