docs: def operator(self, operatorType, value):
          """
          Returns the best match for the given operator type from the list
          of choices.
          
          :param      operatorType | <Query.Op>
                      value        | <variant>
          
          :return     <str>
          """
          if type(value) == datetime.timedelta:
              if operatorType == Query.Op.After:
                  return 'after (delta)'
              elif operatorType == Query.Op.Before:
                  return 'before (delta)'
          
          return super(DateTimePlugin, self).operator(operatorType, value)