/**
  * Set default appeal if unset, sanitize either way.
  */
 protected function setAppeal()
 {
     if ($this->isSomething('appeal')) {
         $appeal = $this->getVal('appeal');
     } else {
         $appeal = $this->gateway->getGlobal('DefaultAppeal');
     }
     $this->setVal('appeal', MessageUtils::makeSafe($appeal));
 }