public function addUnitOfMeasure(UnitOfMeasure $unitOfMeasure)
 {
     $this->UnitsOfMeasure[ClassUtil::getClassName($unitOfMeasure)] = $unitOfMeasure;
     return $this;
 }
 /**
  *
  * @param AdditionalService $additionalService
  */
 public function addValueAddedService(AdditionalService $additionalService)
 {
     $this->ValueAddedServices['AdditionalService'][ClassUtil::getClassName($additionalService)] = $additionalService;
     return $this;
 }