docs: public static void executeCommand(String[] args) throws Exception {
          String subCmd = (args.length > 0) ? args[0] : "";
          args = AdminToolUtils.copyArrayCutFirst(args);
          if(subCmd.equals("get")) {
              SubCommandQuotaGet.executeCommand(args);
          } else if(subCmd.equals("set")) {
              SubCommandQuotaSet.executeCommand(args);
          } else if(subCmd.equals("reserve-memory")) {
              SubCommandQuotaReserveMemory.executeCommand(args);
          } else if(subCmd.equals("unset")) {
              SubCommandQuotaUnset.executeCommand(args);
          } else {
              printHelp(System.out);
          }
      }