question: private void addEmptyRows ( List < String > rawItems ) { List < String > emptyRows = Arrays . asList ( EMPTY_STRING , EMPTY_STRING ) ; List < String > items = new ArrayList < String > ( ) ; items . addAll ( emptyRows ) ; items . addAll ( rawItems ) ; items . addAll ( emptyRows ) ; this . items = items ; }
target:  The first two positions must be empty. The last 2 positions must be empty too.