I'm using jenkins-war:2.204.1 with installed and activated warnings-ng plugin 7.3.0

I configured few tools (Checkstyle and PMD) to analyse the code and return warnings.

I request warnings(issues) via REST from wangings-ng plugin via 
GET http://%host%:%port%/job/%jobname%/%bldnum%/checkstyle/all/api/json

It returns me all found warnings in my source code, but each warning contains absolute fileName.

Question - why?

As I found, old warnings plugin reported relative paths, what is exactly what I need.

Currently, I use EnvInject plugin, in order to request "WORKSPACE" Jenkins war from Jenkins build and I calculate relative paths myself.

I need to know, if current behavior is expected and stable. So I can assume, that fileName in warnings will be always absolute.