destroy() {
      removeAddedEvents();
      instance = null;
      settings = null;
    }
/**
     * Destroys and unbinds all event handlers
     * @private
     */
Destroys and unbinds all event handlers
@private
Destroys and unbinds all event handlers @private
destroy() {
      removeAddedEvents();
      instance = null;
      settings = null;
    }
destroy ( ) { removeAddedEvents ( ) ; instance = null ; settings = null ; }
Destroys and unbinds all event handlers
 @private
Destroys and unbinds all event handlers @private