public function get(string $name, $default = null, $onlyReturnFirst = true)
    {
        if ($this->has($name)) {
            $value = $this->data[$this->normalizeName($name)];

            if ($onlyReturnFirst) {
                return $value[0];
            }
        } else {
            $value = $default;
        }

        return $value;
    }