|null $source_list List of slugs, urls or post id. * @return void */ public function on_error_received( $e, array $source_list = null ) { if ( ! is_null( $this->active_worker ) ) { $this->active_worker->on_rate_error( $e, $source_list ); } Ahrefs_Seo::notify( $e ); } /** * Report error to workers. * * @since 0.7.3 * * @param Worker|null $worker Worker instance. * @return void */ public function set_worker( Worker $worker = null ) { $this->active_worker = $worker; } }