Option modelOpt = obuilder.withLongName("modelClass").withRequired(false).withShortName("d")
.withArgument(abuilder.withName("modelClass").withMinimum(1).withMaximum(1).create())
.withDescription("The ModelDistribution class name.").create();
Option helpOpt = DefaultOptionCreator.helpOption();
Group group = gbuilder.withName("Options").withOption(inputOpt).withOption(outputOpt)
.withOption(modelOpt).withOption(maxIterOpt).withOption(mOpt).withOption(topicsOpt)
.withOption(redOpt).withOption(helpOpt).create();
try {
Parser parser = new Parser();