[i.o.]

Есть такой вариант:

public class BaseObject
{
...............
 
	public function clone():BaseObject
	{
		var _clone:BaseObject = new BaseObject();
 
                _clone._copyFrom_BaseObject( this );
 
		return _clone;
	}
 
        protected function _copyFrom_BaseObject( source:BaseObject ):void
        {
                this.id = source.id;
		this.name = source.name;
		this.type = source.type;
        }
 
...............
 
}

public class WorldObject extends BaseObject
{
	private var currAnim:String;
 
	override public function clone():BaseObject
	{
		return cloneAsWorldObject();
	}
 
	public function cloneAsWorldObject():WorldObject 
	{
		var _clone:WorldObject = new WorldObject();
 
                _clone._copyFrom_WorldObject( this );
 
		return _clone;
	}
 
        protected function _copyFrom_WorldObject( source:WorldObject ):void
        {
                this._copyFrom_BaseObject( source );
 
                this.currAnim = source.currAnim;
        }
}