docs: def override_config(self, options):
          """Override the default configuration."""
  
          for k, v in options.items():
              # Reject names not in the default configuration
              if k not in self.config:
                  raise KeyError("'{}' is not a valid option for '{}'".format(k, self.__class__.__name__))
              self.validate_options(k, v)
              self.config[k] = v