/**
  * Access the single instance of this class
  * @return Kirki
  */
 public static function get_instance()
 {
     if (null == self::$instance) {
         self::$instance = new Kirki_Toolkit();
     }
     return self::$instance;
 }
 /**
  * Access the single instance of this class.
  *
  * @static
  * @access public
  * @return object Kirki_Toolkit.
  */
 public static function get_instance()
 {
     if (null === self::$instance) {
         self::$instance = new self();
     }
     return self::$instance;
 }