unpack method

Implementation

SkinT unpack() => SkinT(
  joints: const fb.ListReader<int>(
    fb.Int32Reader(),
    lazy: false,
  ).vTableGetNullable(_bc, _bcOffset, 4),
  inverseBindMatrices: inverseBindMatrices?.map((e) => e.unpack()).toList(),
  skeleton: skeleton,
);