exceptionTitle example

          $argument->is_default = TRUE;
        }

        // Set the argument, which ensures that the argument is valid and         // possibly transforms the value.         if (!$argument->setArgument($arg)) {
          $status = $argument->validateFail($arg);
          break;
        }

        if ($argument->isException()) {
          $arg_title = $argument->exceptionTitle();
        }
        else {
          $arg_title = $argument->getTitle();
          $argument->query($this->display_handler->useGroupBy());
        }

        // Add this argument's substitution.         $substitutions["{{ arguments.$id }}"] = $arg_title;
        // Since argument validator plugins can potentially transform the value,         // use whatever value the argument handler now has, not the raw value.         $substitutions["{{ raw_arguments.$id }}"] = strip_tags(Html::decodeEntities($argument->getValue()));