def show_confidence_band(self, value):
        """Show confidence band?
            See metricsgraphics documentation
            Args:
                value (list): strings

            Raises:
                TypeError: show_confidence_band must be a list of strings.
        """
        if not isinstance(values, list):
            raise TypeError("show_confidence_band must be a list of strings")

        self.options["show_confidence_band"] = values