public void clearChilds()
{
for (int i = 0; i < children.Count; ++i)
{
ChildLink link = children[i];
link.parent.removeChild(link.child);
}
children.Clear();
}
public void add(DisplayObjectContainer parent, DisplayObject child)
{
parent.addChild(child);
ChildLink link = new ChildLink();
link.parent = parent;
link.child = child;
children.Add(link);
}