code: def CheckDataStoreAccess(self, token, subjects, requested_access="r"):
      
      logging.debug("Checking %s: %s for %s", token, subjects, requested_access)
      raise NotImplementedError()
docs: The main entry point for checking access to AFF4 resources.
  
      Args:
        token: An instance of ACLToken security token.
  
        subjects: The list of subject URNs which the user is requesting access
           to. If any of these fail, the whole request is denied.
  
        requested_access: A string specifying the desired level of access ("r" for
           read and "w" for write, "q" for query).
  
      Raises:
         UnauthorizedAccess: If the user is not authorized to perform the action
         on any of the subject URNs.