def METHOD_NAME(self) -> None:
    class IncludesDelegateWithoutPrefix(HasProps):
        z = bcpi.Include(IsDelegate)
    o = IncludesDelegateWithoutPrefix()
    assert o.x == 12
    assert o.y == "hello"
    assert not hasattr(o, 'z')
    assert 'x' in o.properties_with_values(include_defaults=True)
    assert 'y' in o.properties_with_values(include_defaults=True)
    assert 'x' not in o.properties_with_values(include_defaults=False)
    assert 'y' not in o.properties_with_values(include_defaults=False)