code: function() {
        
        // colorEl listener
        Event.purgeElement(this.colorEl);
        
        // remove squares' mousedown listener(s)
        if (this.colorGrid) {
           Event.purgeElement(this.colorGrid,true);
        }
        
        inputEx.ColorField.superclass.destroy.call(this);
        
     }
docs: Purge all event listeners and remove the component from the dom