def register(self, name):
        return partial(self._register_fnc, name)
operator for `SelectionSet.getDifference`
dataset/ETHPy150Open nvbn/coviolations_web/tools/library.py/BaseLibrary.register--crossover with--dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/SelectionSet.__sub__