def METHOD_NAME():
    white = MarkingDefinition(
        id='marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9',
        created='2017-01-20T00:00:00.000Z',
        definition_type='tlp',
        name='TLP:WHITE',
        definition=TLPMarking(tlp='white'),
    )
    assert white.serialize(sort_keys=True) == TLP_WHITE.serialize(sort_keys=True)