def test_toml_serializer_list_add_remove() -> None:
    original_values = {'GLOBAL': {'backend_packages.add': ['added']}}
    assert (TomlSerializer(original_values).normalize() == {'GLOBAL': {'backend_packages': "+['added']"}})
def test_toml_serializer_list_add_remove() -> None:
    original_values = {'GLOBAL': {'backend_packages.add': ['added']}}
    assert (TomlSerializer(original_values).normalize() == {'GLOBAL': {'backend_packages': "+['added']"}})