docs: def _from_dict(cls, _dict):
          """Initialize a Parties object from a json dictionary."""
          args = {}
          if 'party' in _dict:
              args['party'] = _dict.get('party')
          if 'importance' in _dict:
              args['importance'] = _dict.get('importance')
          if 'role' in _dict:
              args['role'] = _dict.get('role')
          if 'addresses' in _dict:
              args['addresses'] = [
                  Address._from_dict(x) for x in (_dict.get('addresses'))
              ]
          if 'contacts' in _dict:
              args['contacts'] = [
                  Contact._from_dict(x) for x in (_dict.get('contacts'))
              ]
          return cls(**args)