Verifying checkout transaction with java

[Tom146]

I am trying to verify a Checkout transaction with the REST API from Java according to this example: 

https://developer.paypal.com/docs/checkout/integrate/#6-verify-the-transaction

In step 6 the classes com.braintreepayments.http.HttpResponse and com.braintreepayments.http.serializer.Json are being used. I cannot find a Maven repository or otherwise official source for these. What is the recommended way to obtain these classes? Can I use them in production?

[mnmh2001]

Hi Just want to know if you find any solution to this issue, the java example provided by paypal does not compile. Any help is much appreciated.