public function nickname($nickname = null)
    {
        if (is_null($nickname)) {
            return $this->nickname;
        }

        $this->nickname = $nickname;

        return $this;
    }
public function nickname($nickname = null)
    {
        if (is_null($nickname)) {
            return $this->nickname;
        }

        $this->nickname = $nickname;

        return $this;
    }
public function nickname ( $ nickname = null ) { if ( is_null ( $ nickname ) ) { return $ this -> nickname ; } $ this -> nickname = $ nickname ; return $ this ; }
Set nickname for the item manually.

@param string $nickname

@return Item
Set nickname for the item manually .