docs: @Override
      public void intializeSubCommand( Subparsers subparsers ) {
          Subparser sortParser = subparsers.addParser( "sort" )
                  .description( "Jolt CLI Sort Tool. This tool will ingest one JSON input (from a file or standard input) and " +
                          "perform the Jolt sort operation on it. The sort order is standard alphabetical ascending, with a " +
                          "special case for \"~\" prefixed keys to be bumped to the top. The program will return an exit code " +
                          "of 0 if the sort operation is performed successfully or a 1 if an error is encountered." )
                  .defaultHelp( true );
  
          sortParser.addArgument( "input" ).help( "File path to the input JSON that the sort operation should be performed on. " +
                  "This file should contain valid JSON. " +
                  "If this argument is not specified then standard input will be used." )
                  .type( Arguments.fileType().verifyExists().verifyIsFile().verifyCanRead() )
                  .nargs( "?" ).setDefault( (File) null ).required( false );   // these last two method calls make input optional
  
          sortParser.addArgument( "-u" ).help( "Turns off pretty print for the output. Output will be raw json with no formatting." )
                  .action( Arguments.storeTrue() );
      }