code: private static void printUsage() {
      System.err.println(
        "Usage: java AvatarNode [" +
        StartupOption.STANDBY.getName() + "] | [" +
        StartupOption.NODEZERO.getName() + "] | [" +
        StartupOption.NODEONE.getName() + "] | [" +
        StartupOption.FORMAT.getName() + "] | [" +
        StartupOption.UPGRADE.getName() + "] | [" +
        StartupOption.ROLLBACK.getName() + "] | [" +
        StartupOption.FINALIZE.getName() + "] | [" +
        StartupOption.IMPORT.getName() + "]");
    }
docs: Help message for a user