def test_contentsCopies(self):
        msg = Message.new(key="value")
        del msg.contents()["key"]
        self.assertEqual(msg.contents(), {"key": "value"})
Retrieve a serializer register as *name*. If the serializer is not
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_message.py/MessageTests.test_contentsCopies--crossover with--dataset/ETHPy150Open lsbardel/python-stdnet/stdnet/odm/utils.py/get_serializer