public static function GetRelationQueries($sRelCode)
 {
     switch ($sRelCode) {
         case "impacts":
             $aRels = array("nasfilesystem" => array("sQuery" => "SELECT NASFileSystem WHERE nas_id = :this->id", "bPropagate" => true, "iDistance" => 10));
             return array_merge($aRels, parent::GetRelationQueries($sRelCode));
             break;
         default:
             return parent::GetRelationQueries($sRelCode);
     }
 }
 /**
  * Placeholder for backward compatibility (iTop <= 2.1.0)
  * in case an extension attempts to redefine this function...	 
  */
 public static function GetRelationQueries($sRelCode)
 {
     return parent::GetRelationQueries($sRelCode);
 }
 public static function GetRelationQueries($sRelCode)
 {
     switch ($sRelCode) {
         case "impacts":
             $aRels = array();
             if (class_exists('Hypervisor')) {
                 $aRels = array("device" => array("sQuery" => "SELECT Hypervisor WHERE server_id = :this->id", "bPropagate" => true, "iDistance" => 10));
             }
             return array_merge($aRels, parent::GetRelationQueries($sRelCode));
             break;
         case "depends on":
             $aRels = array();
             if (class_exists('LogicalVolume')) {
                 $aRels = array("volume" => array("sQuery" => "SELECT LogicalVolume AS v JOIN lnkServerToVolume AS l1 ON l1.volume_id=v.id WHERE l1.server_id = :this->id", "bPropagate" => true, "iDistance" => 10));
             }
             return array_merge($aRels, parent::GetRelationQueries($sRelCode));
             break;
         default:
             return parent::GetRelationQueries($sRelCode);
     }
 }