====== Prefabs ======

Stray Notes:

  * In the **Editor**, if you have a reference to a Component or GameObject inside a PrefabInstance GameObject, and you unpack the Prefab completely, your old reference will still be valid.  ((
It's untested whether this is because:
  - The reference *is* the same. Unpacking doesn't actually create new Objects, rather it just re-uses the existing ones.
  - Unity creates a set of new Objects for the unpacked prefab, and then fixes up all old reference pointers.
)) The new unpacked objects will have new GlobalObjectIds though.
  * In the Editor, prefabs have two [[GlobalObjectId]]s.
  * Referencing a gameobject to itself inside of a prefab will result in that reference being to the prefab, not the instance of the prefab.