private static String platformPath(String selector,
                                     String macDir, String macSub,
                                     String winVar, String winSub,
                                     String xdgVar, String xdgDfl, String xdgSub) {
    String userHome = System.getProperty("user.home");
    String vendorName = vendorName();

    if (SystemInfoRt.isMac) {
      String dir = userHome + "/Library/" + macDir + '/' + vendorName;
      if (!selector.isEmpty()) dir = dir + '/' + selector;
      if (!macSub.isEmpty()) dir = dir + '/' + macSub;
      return dir;
    }

    if (SystemInfoRt.isWindows) {
      String dir = System.getenv(winVar);
      if (dir == null || dir.isEmpty()) dir = userHome + "\\AppData\\" + (winVar.startsWith("LOCAL") ? "Local" : "Roaming");
      dir = dir + '\\' + vendorName;
      if (!selector.isEmpty()) dir = dir + '\\' + selector;
      if (!winSub.isEmpty()) dir = dir + '\\' + winSub;
      return dir;
    }

    if (SystemInfoRt.isUnix) {
      return getUnixPlatformPath(userHome, selector, xdgVar, xdgDfl, xdgSub);
    }

    throw new UnsupportedOperationException("Unsupported OS: " + SystemInfoRt.OS_NAME);
  }
private static String platformPath(String selector,
                                     String macDir, String macSub,
                                     String winVar, String winSub,
                                     String xdgVar, String xdgDfl, String xdgSub)