/**
  * Returns the DisplayWeightsInKilogram property
  * 
  * @return bool
  * 
  * @author Sebastian Diel <*****@*****.**>
  * @since 13.03.2013
  */
 public static function DisplayWeightsInKilogram()
 {
     if (is_null(self::$displayWeightsInKilogram)) {
         self::$displayWeightsInKilogram = self::getConfig()->DisplayWeightsInKilogram;
     }
     return self::$displayWeightsInKilogram;
 }