code: public static Path getWindupUserDir()
      {
          String userHome = System.getProperty("user.home");
          if (userHome == null)
          {
              Path path = new File("").toPath();
              LOG.warning("$USER_HOME not set, using [" + path.toAbsolutePath().toString() + "] instead.");
              return path;
          }
          return Paths.get(userHome).resolve(".rhamt");
      }
docs: The path $USER_HOME/.rhamt