Tolerance\Tracer\SpanFactory\HttpFoundation\HttpFoundationSpanFactory::getOrGenerateIdentifier PHP Method

    private function getOrGenerateIdentifier(Request $request, $header)
    {
        if (null === ($identifier = $this->getIdentifier($request, $header))) {
            $identifier = $this->identifierGenerator->generate();
        }
        return $identifier;
    }