def request(self, filter=None):
        node = new_ele("get")
        if filter is not None:
            node.append(util.build_filter(filter))
        return self._request(node)
Returns the deferred, which can be fired in tests at will.
dataset/ETHPy150Open ncclient/ncclient/ncclient/operations/retrieve.py/Get.request--crossover with--dataset/ETHPy150Open dustin/twitty-twister/twittytwister/test/test_twitter.py/FakeTwitterAPI.filter