code: def is_limited(self, identifier):
          
          # If there is a limit for this Trigger assigned, make sure it hasn't expired
          if identifier in self._limits:
              limit, blocking = self._limits[identifier]
              if time() < limit:
                  # Limit exists and is active, return True
                  self._log.debug('Global limit enforced for Object {oid}'
                                  .format(oid=id(identifier)))
                  if blocking:
                      raise LimitError
                  return True
              else:
                  # Limit has expired, remove it
                  del self._limits[identifier]
  
          # We're still here, so there are no active limits. Return False
          self._log.debug('No global limit enforced for Object {oid}'.format(oid=id(identifier)))
          return False
docs: Test whether or not there is an active global limit for the specified Trigger or Response instance
          :param identifier: The Trigger or Response object
          :type  identifier: parser.trigger.Trigger or parser.trigger.response.Response
  
          :return: True if there is a limit enforced, otherwise False
          :rtype : bool