return nil, err
		}
		h.Uname, err = iface.Uname()
		if err != nil {
			return nil, err
		}
	}
	if sysStat != nil {
		return h, sysStat(fi, h, doNameLookups)
	}
	return h, nil
}

// FileInfoNames extends [fs.FileInfo].
// Passing an instance of this to [FileInfoHeader] permits the caller
// to avoid a system-dependent name lookup by specifying the Uname and Gname directly.

	return nil
}

func (f *fileInfoNames) Uname() (string, error) {
	return "Uname", nil
}

func (f *fileInfoNames) Gname() (string, error) {
	return "Gname", nil
}

func TestFileInfoHeaderUseFileInfoNames(t *testing.T) {
	info := &fileInfoNames{}
	header, err := FileInfoHeader(info, "")
	if err != nil {
		t.Fatal(err)
	}
	if header.Uname != "Uname" {