def getDifference(self, other):
        sel = self.asSelectionSet()
        sel.difference(other)
        return sel
returns the next sibling to this one, or None
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/ObjectSet.getDifference--crossover with--dataset/ETHPy150Open manahl/mdf/mdf/viewer/frame.py/TreeNode.next_sibling