code: public static void displayVersionInfo(String command) {
  
      String version = ProxyInitStrategy.class.getPackage()
        .getImplementationVersion();
  
      if (version == null) {
        version = "N/A";
      }
  
      System.out.format("%s v. %s (%s)\n", command, version,
        getAPIVersionString());
    }
docs: Display version information.
  
  @param command
  a command string