Gets the list of supported gobject.types.TYPE_FLAG_RESERVED_ID_BITs that can be dropped on the target.
If no types have been set, NULL will be returned.
the G_TYPE_INVALID-terminated array of types included in formats
Gets the list of supported gobject.types.TYPE_FLAG_RESERVED_ID_BITs that can be dropped on the target.
If no types have been set, NULL will be returned.