Empty ALL options.

        :param bool empty: When :data:`True`, completelly removes all options;
            when :data:`False`, sets them back to its original value.

        This function skips ``locked`` control.

def reset_options(self, empty=True):
        """Empty ALL options.

        :param bool empty: When :data:`True`, completelly removes all options;
            when :data:`False`, sets them back to its original value.

        This function skips ``locked`` control.
        """
        if empty:
            self.gc = pd.DataFrame(columns=self.clmn)
        else:
            self.gc["value"] = self.gc["default"]