public function getAll(): array
    {
        $namespace = $this->getNamespace();
        $length = mb_strlen($namespace);

        $values = [];

        $data = $this->session->getAll();
        foreach ($data as $key => $val) {
            if (mb_substr($key, 0, $length) === $namespace) {
                $key = mb_substr($key, $length);
                $values[$key] = $val;
            }
        }

        return $values;
    }