def _remove_notifiers(self, handler, name):
        if name in self._trait_notifiers:
            nlist = self._trait_notifiers[name]
            try:
                index = nlist.index(handler)
            except ValueError:
                pass
            else:
                del nlist[index]
dataset/ETHPy150Open enthought/depsolver/depsolver/bundled/traitlets/_implementation.py/HasTraits._remove_notifiers/original