Initialize a UtteranceAnalyses object from a json dictionary.

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