[Test] public void CreateWithSerializable(
[Values(true, false)] bool safe)
{
o(Dish <U> .Create(new U(), safe) is PolyDish <U>);
}
[Test] public void CreateSafeDishWithClonable() => o(Dish <T> .Create(clonable, safe: true) is PolyDish <T>);
[Test] public void CreateUnsafeDishWithClonable() => o(Dish <T> .Create(clonable, safe: false) is DirtyDish <T>);