[box: 0,0 800x600] [box: 0,0 800x60] [box: 0,0 800x60] [box: 0,0 100x20] [box: 0,0 100x20] "Flow content" [box: 0,0 70x20] [fragmentBox#0 0,0 40x10] [fragmentBox#1 0,10 70x10] [box: 0,20 100x40] [box: 0,30 30x10] "ABS" [box: 0,30 30x10]