def METHOD_NAME():
    green = MarkingDefinition(
        id='marking-definition--34098fce-860f-48ae-8e50-ebd3cc5e41da',
        created='2017-01-20T00:00:00.000Z',
        definition_type='tlp',
        definition=TLPMarking(tlp='green'),
    )
    assert green.serialize(sort_keys=True) == TLP_GREEN.serialize(sort_keys=True)