GroupBuilder gbuilder = new GroupBuilder();
Option helpOpt = DefaultOptionCreator.helpOption();
Option inputDirOpt = obuilder.withLongName("input").withRequired(true).withArgument(
abuilder.withName("input").withMinimum(1).withMaximum(1).create()).withDescription(
"The input directory, containing properly formatted files: "
+ "One doc per line, first entry on the line is the label, rest is the evidence")
.withShortName("i").create();
Option outputOpt = obuilder.withLongName("output").withRequired(true).withArgument(