docs: public static void executeHelp(String[] args, PrintStream stream) throws Exception {
          String subCmd = (args.length > 0) ? args[0] : "";
          if(subCmd.equals("fetch-entries")) {
              SubCommandStreamFetchEntries.printHelp(stream);
          } else if(subCmd.equals("fetch-keys")) {
              SubCommandStreamFetchKeys.printHelp(stream);
          } else if(subCmd.equals("mirror")) {
              SubCommandStreamMirror.printHelp(stream);
          } else if(subCmd.equals("update-entries")) {
              SubCommandStreamUpdateEntries.printHelp(stream);
          } else {
              printHelp(stream);
          }
      }