def _on_trait_changed(self, obj, trait_name, old, new):

        if not self._event_handled:
            self._set_extensions(new)

        return
Construct an ENUM.
dataset/ETHPy150Open enthought/envisage/envisage/extension_point_binding.py/ExtensionPointBinding._on_trait_changed--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/dialects/drizzle/base.py/ENUM.__init__