‘protected’ implementation in Actionscript 3 is BROKEN

gistfile1.as

public class BaseClass{
	public function modifyProperty(property:String, value:Object):void{
		this[property] = value;
	}
}

public class SubClass extends SubClass{
	protected var count:int;
}

public function test():void{
	var testObj:BaseClass = new SubClass();
	testObj.modifyProperty('count', 3);
}