def __iand__(self, s):
        return self.intersection(s)
OrphanHALNavigator has no link object
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/SelectionSet.__iand__--crossover with--dataset/ETHPy150Open deontologician/restnavigator/restnavigator/halnav.py/OrphanHALNavigator._update_self_link