code: function() {
          this.layer  = null;
          this.bounds = null;
          this.size = null;
          this.position = null;
          
          if (this.eventListeners) {
              this.events.un(this.eventListeners);
          }
          this.events.destroy();
          this.eventListeners = null;
          this.events = null;
      }
docs: APIMethod: destroy
  Nullify references to prevent circular references and memory leaks.