def setValue(self, v):
        if v or not ircutils.isNick(v):
            raise registry.InvalidRegistryValue('Value must be a valid nick or the empty string.')
        registry.String.setValue(self, v)
dataset/ETHPy150Open ProgVal/Limnoria/plugins/Services/config.py/ValidNickOrEmptyString.setValue/operator `and` -> `or`