@SuppressWarnings("SameParameterValue")
    public List<String> search(String searchString){
        String[] rows = sb.toString().split(System.getProperty("line.separator"));
        List<String> filteredRows = new ArrayList<>();
        //Filtering
        Arrays.asList(rows).forEach(s -> {if (s.contains(searchString)) filteredRows.add(s);});
        //Printing result to System.out
        System.out.printf("Lines containing \"%s\":%n", searchString);
        filteredRows.forEach(System.out::println);

        return filteredRows;
    }