docs: def _deserialize_v1(self, deserialized):
          '''Deserialize a JSON macaroon in v1 format.
  
          @param serialized the macaroon in v1 JSON format.
          @return the macaroon object.
          '''
          from pymacaroons.macaroon import Macaroon, MACAROON_V1
          from pymacaroons.caveat import Caveat
  
          caveats = []
          for c in deserialized.get('caveats', []):
              caveat = Caveat(
                  caveat_id=c['cid'],
                  verification_key_id=(
                      utils.raw_b64decode(c['vid']) if c.get('vid')
                      else None
                  ),
                  location=(
                      c['cl'] if c.get('cl') else None
                  ),
                  version=MACAROON_V1
              )
              caveats.append(caveat)
  
          return Macaroon(
              location=deserialized.get('location'),
              identifier=deserialized['identifier'],
              caveats=caveats,
              signature=deserialized['signature'],
              version=MACAROON_V1
          )