public function transform($object)
    {
        if (null === $object) {
            return '';
        }

        return current(array_values($this->om->getClassMetadata($this->entityName)->getIdentifierValues($object)));
    }
public function transform($object)
    {
        if (null === $object) {
            return '';
        }

        return current(array_values($this->om->getClassMetadata($this->entityName)->getIdentifierValues($object)));
    }
public function transform ( $ object ) { if ( null === $ object ) { return '' ; } return current ( array_values ( $ this -> om -> getClassMetadata ( $ this -> entityName ) -> getIdentifierValues ( $ object ) ) ) ; }
Do nothing.

@param object|null $object

@return string
Do nothing .