public function getUrlPK()
    {
        if ($this->urlPK == null) {
            $this->urlPK = $this->getPrimaryKey();
        }

        return $this->urlPK;
    }
public function getUrlPK()
    {
        if ($this->urlPK == null) {
            $this->urlPK = $this->getPrimaryKey();
        }

        return $this->urlPK;
    }
public function getUrlPK ( ) { if ( $ this -> urlPK == null ) { $ this -> urlPK = $ this -> getPrimaryKey ( ) ; } return $ this -> urlPK ; }
The name of the field used as a foreign key in other tables
@return string
The name of the field used as a foreign key in other tables