PrefabUtility.GetPrefabParent
static function GetPrefabParent(source: Object): Object;
static Object GetPrefabParent(Object source);
static def GetPrefabParent(source as Object) as Object
Description

Returns the GameObject parent of source, or null if it can't be found.

This also returns the prefab parent if the prefab has become disconnected, which can then be used to reconnect the prefab.