What version and type of Java Jar files are loaded?

[#1]

I know Apigee is built on Java, and I found an old list of JARS in the community (circa Spring v3.2), but the post was over a year old. We are using Spring Boot for the Backend Microservices, and Ideally like to use the Java Callout to interact with the Audit Service produced by a microservice. How can I query the loaded Java Jar files and versions?

I tried:

http://myManagementAPIServer:8080/v1/organizations/myorg/environments/dev/resourcefiles

At the ORG and Api level too, and I get an empty response—call works but nothing loaded:

JAR Files in Environment ...

HTTP/1.1 200 OK
Content-Type: application/xml
Date: Mon, 09 Nov 2015 22:34:15 GMT
Content-Length: 73

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ResourceFiles/>

Obviously I am making the wrong call, but I can’t figure out which Management API I need to call to obtain the loaded Apigee JAR/versions?