docs: def _from_dict(cls, _dict):
          """Initialize a SpeechRecognitionResults object from a json dictionary."""
          args = {}
          if 'results' in _dict:
              args['results'] = [
                  SpeechRecognitionResult._from_dict(x)
                  for x in (_dict.get('results'))
              ]
          if 'result_index' in _dict:
              args['result_index'] = _dict.get('result_index')
          if 'speaker_labels' in _dict:
              args['speaker_labels'] = [
                  SpeakerLabelsResult._from_dict(x)
                  for x in (_dict.get('speaker_labels'))
              ]
          if 'warnings' in _dict:
              args['warnings'] = _dict.get('warnings')
          return cls(**args)