code: private void helpAction(String arg) {
          if (arg == null) {
              printMainUsage();
              return;
          }
  
          String helpTarget = arg.toLowerCase();
  
          if (helpTarget.equals(ACTION_VIEW)) {
              printViewUsage();
          } else if (helpTarget.equals(ACTION_COPY)) {
              printCopyUsage();
          } else if (helpTarget.equals(ACTION_LISTINSTANCES)) {
              printListInstancesUsage();
          } else {
              printMainUsage();
          }
      }
docs: /*
  Prints the appropriate help, based on the arg