contextTokenRequired example

if (!$request->attributes->has(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_ID)) {
            $this->decorated->resolve($request);

            return;
        }

        if (!$this->isRequestScoped($request, SalesChannelContextRouteScopeDependant::class)) {
            return;
        }

        if (!$request->headers->has(PlatformRequest::HEADER_CONTEXT_TOKEN)) {
            if ($this->contextTokenRequired($request)) {
                throw RoutingException::missingRequestParameter(PlatformRequest::HEADER_CONTEXT_TOKEN);
            }

            $request->headers->set(PlatformRequest::HEADER_CONTEXT_TOKEN, Random::getAlphanumericString(32));
        }

        // Retrieve context for current request         $usedContextToken = (string) $request->headers->get(PlatformRequest::HEADER_CONTEXT_TOKEN);
        $contextServiceParameters = new SalesChannelContextServiceParameters(
            (string) $request->attributes->get(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_ID),
            $usedContextToken,