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