def METHOD_NAME(self):
    (operator, dq) = self.build_seed()
    try:
        fm_func_lambda: Callable[[str], Iterable[str]] = lambda i: [str(x) for x in range(len(i))]
        flatted = dq.flatmap(fm_func_lambda)
        self.assertRaises("the current implementation does not support lambdas")
        # self.validate_flatmap(flatted, operator)
    except PywyException as e:
        self.assertTrue("the return for the FlatmapFunction is not Iterable" in str(e))