Returns a pretty text version of the key for the inputted value.

        :param      value | <variant>

        :return     <str>

def label(self, value):
        """
        Returns a pretty text version of the key for the inputted value.

        :param      value | <variant>

        :return     <str>
        """
        return self._labels.get(value) or text.pretty(self(value))