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