def validate ( self, object, name, value ):
        if value in self.values:
            return value

        self.error( object, name, value )
Graph node unique identification.
dataset/ETHPy150Open enthought/traits/traits/trait_types.py/BaseEnum.validate--crossover with--dataset/ETHPy150Open igordejanovic/Arpeggio/arpeggio/export.py/DOTExportAdapter.id