question: private void prepareDataSet ( ) { dataSet1 = Arrays . asList ( new String [ ] { "a" , "b" } ) ; dataSet2 = Arrays . asList ( new String [ ] { "c" , "d" } ) ; dataSet3 = Arrays . asList ( new String [ ] { "e" , "f" } ) ; }
target:  prepare the dataset required for running test cases