public function editPropertyValueByLg( core_kernel_classes_Property $prop, $value, $lg)
    {
        $returnValue = (bool) false;   
        $returnValue = $this->removePropertyValueByLg($prop, $lg);
        $returnValue &= $this->setPropertyValueByLg($prop, $value, $lg);
        return (bool) $returnValue;
    }