/**
  * Get Instance Class
  *
  * @return C3_Auth
  * @since 4.0.0
  * @access public
  */
 public static function get_instance()
 {
     if (!isset(self::$instance)) {
         $c = __CLASS__;
         self::$instance = new $c();
     }
     return self::$instance;
 }
 public function c3_invalidation($post = null)
 {
     $invalidator = C3_Invalidation::get_instance();
     $result = $invalidator->invalidation($post);
 }