src/Peach/Http/Header/SetCookie.php
public function format()
    {
        $result = array();
        foreach ($this->items as $item) {
            $result[] = $item->format();
        }
        return $result;
    }
public function format()
    {
        $result = array();
        foreach ($this->items as $item) {
            $result[] = $item->format();
        }
        return $result;
    }
すべての Set-Cookie ヘッダーの値を配列で返します.

@return array すべての Set-Cookie ヘッダー値の配列