question: public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . add ( new Option ( "\tSkip identical instances (distances equal to zero).\n" , "S" , 1 , "-S" ) ) ; result . addAll ( Collections . list ( super . listOptions ( ) ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.