question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > newVector = new Vector < Option > ( 3 ) ; newVector . addElement ( new Option ( "\tSets the attribute index\n" + "\t(default: last)" , "C" , 1 , "-C <col>" ) ) ; newVector . addElement ( new Option ( "\tSets the label of the newly merged classes\n" + "\t(default: 'merged')" , "L" , 1 , "-L <label>" ) ) ; newVector . addElement ( new Option ( "\tSets the merge range. 'first and 'last' are accepted as well.'\n" + "\tE.g.: first-5,7,9,20-last\n" + "\t(default: 1,2)" , "R" , 1 , "-R <range>" ) ) ; return newVector . elements ( ) ; }
target:  Returns an enumeration describing the available options.