code: function(argument, event_args, listener_args) {
  
  		var new_classes = this._toClassNames(argument.getValue().toString().trim());
  
  		if (this._is_inDOM) {
  
  			Firestorm.Element.removeClasses(this.getDOMElement(), this._class_bindings_values[listener_args.name]);
  			Firestorm.Element.addClasses(this.getDOMElement(), new_classes);
  
  		}
  
  		this._class_bindings_values[listener_args.name] = new_classes;
  
  	}
docs: Class binding argument has changed it's value. Refresh internal class values and element's classes
  @param {Lava.scope.Argument} argument
  @param event_args
  @param listener_args