def dissociate(self):
        self._parent.set_attribute(self._foreign_key, None)

        return self._parent.set_relation(self._relation, Result(None, self, self._parent))
testing if the to xml method is working properly with the clips are
dataset/ETHPy150Open sdispater/orator/orator/orm/relations/belongs_to.py/BelongsTo.dissociate--crossover with--dataset/ETHPy150Open eoyilmaz/anima/tests/previs/test_track.py/TrackTestCase.test_to_xml_method_with_optimized_clips_is_working_properly