text: public JapaneseKatakanaStemFilterFactory(Map<String,String> args) {super(args);minimumLength = getInt(args, MINIMUM_LENGTH_PARAM, JapaneseKatakanaStemFilter.DEFAULT_MINIMUM_LENGTH);if (minimumLength < 2) {throw new IllegalArgumentException("Illegal " + MINIMUM_LENGTH_PARAM + " " + minimumLength + " (must be 2 or greater)");}if (!args.isEmpty()) {throw new IllegalArgumentException("Unknown parameters: " + args);}}