code: def show_confidence_band(self, value):
          
          if not isinstance(values, list):
              raise TypeError("show_confidence_band must be a list of strings")
  
          self.options["show_confidence_band"] = values
docs: Show confidence band?
              See metricsgraphics documentation
              Args:
                  value (list): strings
  
              Raises:
                  TypeError: show_confidence_band must be a list of strings.