private function getRelativeArtifactRepresentation()
 {
     if ($this->moved_artifact == $this->artifact_higher) {
         return $GLOBALS['Language']->getText('plugin_tracker_include_artifact', 'priority_change_before_than') . ' ' . $this->artifact_lower->fetchColoredXRef();
     }
     return $GLOBALS['Language']->getText('plugin_tracker_include_artifact', 'priority_change_after_than') . ' ' . $this->artifact_higher->fetchColoredXRef();
 }