[Wolsh]

Dukobpa3, без проблем))

package 
{
	import flash.display.DisplayObject;
 
	public interface IDOCAddable 
	{
		public function get view():DisplayObject;
	}
}

package 
{
	import flash.display.DisplayObject;
	import flash.display.Sprite;
 
	public class ChildDO extends Sprite implements IDOCAddable 
	{
		public function ChildDO() { }
 
		/* INTERFACE IDOCAddable */
 
		public function get view():DisplayObject 
		{
			return this;
		}
	}
}

package
{
	import flash.display.Sprite;
 
	public class MainClass extends Sprite 
	{
 
		public function MainClass() 
		{
			addAsChild(new ChildDO());
		}
 
		private function addAsChild(child:IDOCAddable):void 
		{
			this.addChild(child.view);
		}
	}
}