code: private static synchronized void addTransformer() {
          if (detailedTransformTrace && tc.isEntryEnabled())
              Tr.entry(tc, "addTransformer");
  
          if (registeredTransformer == null && instrumentation != null) {
              registeredTransformer = new LibertyRuntimeTransformer();
              instrumentation.addTransformer(registeredTransformer, true);
          }
  
          if (detailedTransformTrace && tc.isEntryEnabled())
              Tr.exit(tc, "addTransformer");
      }
docs: Add the RAS class transformer to the
  instrumentation {@link java.lang.instrument.ClassFileTransformer} list.