topicCategories = $topicCategories; } public function getTopicCategories() { return $this->topicCategories; } public function setTopicIds($topicIds) { $this->topicIds = $topicIds; } public function getTopicIds() { return $this->topicIds; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(ChannelTopicDetails::class, 'Google_Service_YouTube_ChannelTopicDetails');