question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . addElement ( new Option ( "\tFull class name of filter to use, followed\n" + "\tby filter options.\n" + "\teg: \"weka.filters.unsupervised.attribute.Remove -V -R 1,2\"\n" + "\t(default: weka.filters.MultiFilter with\n" + "\tweka.filters.unsupervised.attribute.ReplaceMissingValues)" , "F" , 1 , "-F <filter specification>" ) ) ; result . addElement ( new Option ( "\tThe class index.\n" + "\t(default: -1, i.e. unset)" , "c" , 1 , "-c <the class index>" ) ) ; result . addAll ( Collections . list ( super . listOptions ( ) ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.