private TaskSeriesCollection createCollection2() {
        TaskSeriesCollection result = new TaskSeriesCollection();
        TaskSeries s1 = new TaskSeries("S1");
        Task t1 = new Task("Task 1", new Date(10), new Date(20));
        t1.addSubtask(new Task("Task 1A", new Date(10), new Date(15)));
        t1.addSubtask(new Task("Task 1B", new Date(16), new Date(20)));
        t1.setPercentComplete(0.10);
        s1.add(t1);
        Task t2 = new Task("Task 2", new Date(30), new Date(40));
        t2.addSubtask(new Task("Task 2A", new Date(30), new Date(35)));
        t2.addSubtask(new Task("Task 2B", new Date(36), new Date(40)));
        t2.setPercentComplete(0.20);
        s1.add(t2);
        result.add(s1);
        TaskSeries s2 = new TaskSeries("S2");
        Task t3 = new Task("Task 3", new Date(50), new Date(60));
        t3.addSubtask(new Task("Task 3A", new Date(50), new Date(55)));
        t3.addSubtask(new Task("Task 3B", new Date(56), new Date(60)));
        t3.setPercentComplete(0.30);
        s2.add(t3);
        result.add(s2);
        return result;