def METHOD_NAME():
    for _f in [_test_list_expr, _test_optional_list_expr]:
        f = args_converter.to_list_expr("arg", "args", "kwargs")(_f)
        for x in test_cases:
            f(
                [x],
                [x],  # the first argument in *args
                [x, x],  # the second argument in *args
                test_kwargs=[x, (x,)],
            )
            if _f == _test_optional_list_expr:
                f(None, None, [x], test_kwargs=None)