public function isOpen(Tracker_Artifact $artifact)
 {
     if (!$this->getField()) {
         return true;
     }
     $status = $artifact->getStatus();
     if (!$status) {
         return false;
     }
     return in_array($status, $this->getOpenLabels());
 }
 /**
  * Get status label independent of language (hence english)
  *
  * @param Tracker_Artifact $artifact
  * @return string
  */
 public function getNormalizedStatusLabel(Tracker_Artifact $artifact)
 {
     $status = $artifact->getStatus();
     if (!$status) {
         return '';
     }
     $key = self::CLOSED;
     if (in_array($artifact->getStatus(), $this->getOpenLabels())) {
         $key = self::OPEN;
     }
     return $key;
 }