text: public StopFilterFactory(IDictionary<string, string> args): base(args){AssureMatchVersion();stopWordFiles = Get(args, "words");format = Get(args, "format", (null == stopWordFiles ? null : FORMAT_WORDSET));ignoreCase = GetBoolean(args, "ignoreCase", false);enablePositionIncrements = GetBoolean(args, "enablePositionIncrements", true);if (args.Count > 0){throw new System.ArgumentException("Unknown parameters: " + args);}}