docs: def _to_dict(self):
          """Return a json dictionary representing this model."""
          _dict = {}
          if hasattr(self, 'generic') and self.generic is not None:
              _dict['generic'] = [x._to_dict() for x in self.generic]
          if hasattr(self, 'modifiers') and self.modifiers is not None:
              _dict['modifiers'] = self.modifiers._to_dict()
          if hasattr(self, '_additionalProperties'):
              for _key in self._additionalProperties:
                  _value = getattr(self, _key, None)
                  if _value is not None:
                      _dict[_key] = _value
          return _dict