public function get_tour() {
        if ($this->tour === null) {
            $this->tour = tour::instance($this->tourid);
        }
        return $this->tour;
    }
public function get_tour() {
        if ($this->tour === null) {
            $this->tour = tour::instance($this->tourid);
        }
        return $this->tour;
    }
public function get_tour ( ) { if ( $ this -> tour === null ) { $ this -> tour = tour :: instance ( $ this -> tourid ) ; } return $ this -> tour ; }
Get the Tour instance that this step belongs to.

@return  tour
Get the Tour instance that this step belongs to .