docs: def _to_dict(self):
          """Return a json dictionary representing this model."""
          _dict = {}
          if hasattr(self, 'status') and self.status is not None:
              _dict['status'] = self.status
          if hasattr(self, 'model_id') and self.model_id is not None:
              _dict['model_id'] = self.model_id
          if hasattr(self, 'language') and self.language is not None:
              _dict['language'] = self.language
          if hasattr(self, 'description') and self.description is not None:
              _dict['description'] = self.description
          if hasattr(self, 'workspace_id') and self.workspace_id is not None:
              _dict['workspace_id'] = self.workspace_id
          if hasattr(self, 'version') and self.version is not None:
              _dict['version'] = self.version
          if hasattr(
                  self,
                  'version_description') and self.version_description is not None:
              _dict['version_description'] = self.version_description
          if hasattr(self, 'created') and self.created is not None:
              _dict['created'] = datetime_to_string(self.created)
          return _dict