code: async def get_link_secret_label(self) -> str:
          
  
          LOGGER.debug('Wallet.get_link_secret_label >>>')
  
          if not self.handle:
              LOGGER.debug('Wallet.get_link_secret <!< Wallet %s is closed', self.name)
              raise WalletState('Wallet {} is closed'.format(self.name))
  
          rv = None
          records = await self.get_non_secret(TYPE_LINK_SECRET_LABEL)
          if records:
              rv = records[str(max(int(k) for k in records))].value  # str to int, max, and back again
  
          LOGGER.debug('Wallet.get_link_secret_label <<< %s', rv)
          return rv
docs: Get current link secret label from non-secret storage records; return None for no match.
  
          :return: latest non-secret storage record for link secret label