Stem  root    = Stem.addRootStem(s);
Stem.addRootStem(s);
  private static void _installGroupsAndStems() {    try {      GrouperSession s = GrouperSession.start(        SubjectFinder.findById(          GrouperConfig.ROOT, GrouperConfig.IST, InternalSourceAdapter.ID        )      );      Stem  root    = Stem.addRootStem(s);      EventLog.info(s, M.STEM_ROOTINSTALL);    }    catch (Exception e) {       String msg = E.RI_ISG + e.getMessage();      ErrorLog.fatal(RegistryInstall.class, msg);      throw new RuntimeException(msg, e);    }  } // private static void _installGroupsAndStems()