Set a new global trigger or response limit
        :param identifier: The Trigger or Response object
        :type  identifier: parser.trigger.Trigger or parser.trigger.response.Response

        :param expires_at: The limit expiration as a Unix timestamp
        :type  expires_at: float

        :param blocking: When True and a limit is triggered, no other Trigger or Response's will be attempted
        :type  blocking: bool

def set_limit(self, identifier, expires_at, blocking=False):
        """
        Set a new global trigger or response limit
        :param identifier: The Trigger or Response object
        :type  identifier: parser.trigger.Trigger or parser.trigger.response.Response

        :param expires_at: The limit expiration as a Unix timestamp
        :type  expires_at: float

        :param blocking: When True and a limit is triggered, no other Trigger or Response's will be attempted
        :type  blocking: bool
        """
        self._limits[identifier] = (expires_at, blocking)