| type | The type of the object. | 
| typeDB | The user script TypeDB for the player. | 
Hash128 The unique hash for a type's serialized layout.
Returns a unique hash for a given type's serialized layout.
        Passing in null will provide a hash for the serialized layout of the type as it exists in the editor, passing in a valid TypeDB for a player will provide a hash for the layout as it exists in the player.
Internal use only. See note on ContentBuildInterface.