def _checkUnsubscribe(self, request):
if len(self.factory.windowUnsubscribe[self.addr]) == self._window:<EOL><INDENT>raise MQTTWindowError("<STR_LIT>", self._window)<EOL><DEDENT>if not isinstance(request.topics, list):<EOL><INDENT>raise TopicTypeError(type(topic))<EOL><DEDENT>
Assert unsubscribe parameters