Emarref\Jwt\Serialization\Compact::parseHeaders PHP Метод

    protected function parseHeaders($headersJson)
    {
        $parameters = [];
        $headers = json_decode($headersJson, true);
        if (!is_array($headers) || empty($headers)) {
            throw new \InvalidArgumentException('Not a valid header of JWT string passed for deserialization');
        }
        foreach ($headers as $name => $value) {
            $parameter = $this->headerParameterFactory->get($name);
            $parameter->setValue($value);
            $parameters[] = $parameter;
        }
        return $parameters;
    }