final List<String> registrationTokens, final String topic, final String path) { checkRegistrationTokens(registrationTokens); checkTopic(topic); return new CallableOperation<TopicManagementResponse, FirebaseMessagingException>() { @Override
final List<String> registrationTokens, final String topic, final String path) { checkRegistrationTokens(registrationTokens); checkTopic(topic); return new CallableOperation<TopicManagementResponse, FirebaseMessagingException>() { @Override