Referencing back to the parent from a child object

_class:Class = getDefinitionByName("com.site.Class") as Class;

_class(parent.parent).function();

trace(Class);

var class:Class = new Class(this);

public function Class(objectRef:Object) {
    _parentRef = objectRef;
}

import com.site.Class;
com.site.Class.method();

//Child.as
package
{
	import flash.events.EventDispatcher;
	import flash.events.Event;

	public class Child extends EventDispatcher
	{
		public function doSomething():void
		{
			var e:Event = new Event(Event.COMPLETE);
			dispatchEvent(e);
		}

		public function foo():void
		{
			trace("foo");
		}
	}
}


//Parent.as
package
{
	import flash.display.Sprite;
	import flash.events.Event;
	public class Parent extends Sprite
	{
		private var child:Child;
		public function Parent():void
		{
			c = new Child();
			c.addEventListener(Event.COMPLETE, onComplete);
			c.foo();//traces foo

			c.doSomething()
		}

		public function onComplete(e:Event):void
		{
			trace("Child broadcast Event.COMPLETE");
		}

	}
}

private static const class:Class;

public static function setClass(_class:Class){
class = _class;
}
public static function getClass(void):Class{
return class;
}

ParentClass(parent).parentFunction();

ParentClass(stage.getChildAt(0)).parentFunction();