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