code: function() {
  			if (!this._attached) {
  
  				forEachEventType(this._eventTypes, this._handler, function(eventType) {
  					var that = this;
  
  					function handleEvent() {
  						that._handleEvent.apply(that, arguments);
  					}
  
  					Box.DOM.on(this.element, eventType, handleEvent);
  
  					this._boundHandler[eventType] = handleEvent;
  				}, this);
  
  				this._attached = true;
  			}
  		}
docs: Attaches all event handlers for the DOM element.
  @returns {void}