public function previous_level()
    {
        if (!$this->previous_level) {
            $this->previous_level = new Level(
                $this->level->profile,
                $this->level->number - 1
            );
        }
        return $this->previous_level;
    }
public function previous_level()
    {
        if (!$this->previous_level) {
            $this->previous_level = new Level(
                $this->level->profile,
                $this->level->number - 1
            );
        }
        return $this->previous_level;
    }
public function previous_level ( ) { if ( ! $ this -> previous_level ) { $ this -> previous_level = new Level ( $ this -> level -> profile , $ this -> level -> number - 1 ) ; } return $ this -> previous_level ; }
Previous level.

@return Level
Previous level .