docs: def _from_dict(cls, _dict):
          """Initialize a Words object from a json dictionary."""
          args = {}
          if 'words' in _dict:
              args['words'] = [Word._from_dict(x) for x in (_dict.get('words'))]
          else:
              raise ValueError(
                  'Required property \'words\' not present in Words JSON')
          return cls(**args)