public void FiveUnionImplicitCastToFour()
 => UnionTestExtensions.AssertFour <byte, sbyte, ushort, short, uint>((short)1)
 .Should()
 .Be(1);
 public void EightUnionImplicitCastToFour()
 => UnionTestExtensions.AssertFour <byte, sbyte, ushort, short, uint, int, ulong, long>((short)1)
 .Should()
 .Be(1);