docs: def dump(self, model, value):
          """
          Convert attrs data into unstructured data with basic types, recursively:
  
          - attrs classes => dictionaries
          - Enumeration => values
          - Other types are let through without conversion,
            such as, int, boolean, dict, other classes.
          """
          try:
              return self._cattrs_converter.unstructure(value)
          except (ValueError, TypeError) as e:
              raise SerializationException(str(e))