Tolerance\Tracer\SpanFactory\Amqp\AmqpSpanFactory::getMessageHeader PHP Method

    private function getMessageHeader(AMQPMessage $message, $header)
    {
        $headers = $message->has('application_headers') ? $message->get('application_headers') : [];
        return array_key_exists($header, $headers) ? $headers[$header] : null;
    }