public static GameObject ExtAddChild(this GameObject parent, Object prefab)
{
if (parent == null || prefab == null)
{
return(null);
}
GameObject go = (GameObject)prefab.ExtInstantiate();
if (go == null)
{
return(null);
}
go.transform.ExtSetParent(parent.transform);
go.ExtSetLayer(parent.layer);
return(go);
}
