docs: def clean(self):
          """
          Cleans the input values of this configuration object.
  
          Fields that have gotten updated through properties are converted to configuration values that match the
          format needed by functions using them. For example, for list-like values it means that input of single strings
          is transformed into a single-entry list. If this conversion fails, a ``ValueError`` is raised.
          """
          all_props = self.__class__.CONFIG_PROPERTIES
          for prop_name in self._modified:
              attr_config = all_props.get(prop_name)
              if attr_config and attr_config.input_func:
                  self._config[prop_name] = attr_config.input_func(self._config[prop_name])
          self._modified.clear()