/**
  * Add actions
  *
  * @return void
  */
 static function add_actions()
 {
     // Do same actions as file field
     parent::add_actions();
     // Attach images via Ajax
     add_action('wp_ajax_rwmb_attach_media', array(__CLASS__, 'wp_ajax_attach_media'));
 }
 /**
  * Add field actions
  *
  * @return	void
  */
 static function add_actions()
 {
     parent::add_actions();
     add_action('wp_ajax_rwmb_plupload_image_upload', array(__CLASS__, 'handle_upload'));
 }
 /**
  * Add custom actions for the field.
  */
 public static function add_actions()
 {
     parent::add_actions();
     add_filter('get_media_item_args', array(__CLASS__, 'allow_img_insertion'));
 }