Automattic\WP\Cron_Control\Internal_Events::is_internal_event PHP Метод

Events that are always run, regardless of how many jobs are queued

public is_internal_event ( $action )

    public function is_internal_event($action)
    {
        return in_array($action, wp_list_pluck($this->internal_jobs, 'action'));
    }

Internal_Events