public static BitVector <T> from <T>(T src, BitSize?n = null)
where T : unmanaged
=> BitVector <T> .FromCell(src, n);
public static BitVector <N, T> from <N, T>(T src, N n = default)
where N : ITypeNat, new()
where T : unmanaged
=> BitVector <N, T> .FromCell(src);
