def __contains__(self, item):
        if isinstance(item, (DependNode, DagNode, general.Attribute) ):
            return self.apicls.hasItem(self, item.__apiobject__())
        elif isinstance(item, general.Component):
            raise NotImplementedError, 'Components not yet supported'
        else:
            return self.apicls.hasItem(self, general.PyNode(item).__apiobject__())
Returns (system,release,version) aliased to common
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/SelectionSet.__contains__--crossover with--dataset/ETHPy150Open babble/babble/include/jython/Lib/platform.py/system_alias