blocking regions: 2
transformed visual inside: true
transformed original position: false
clipped visible inside: true
clipped overflow outside clip: false
display list:
AccumulatedVisualContext Tree:
  [1] scroll_frame_id=1 (PaintableWithLines(BlockContainer<PRE>#out))
    [2] transform=[1,0,0,1,100,0] origin=(20,20) (PaintableWithLines(BlockContainer<DIV>#transformed))
    [3] clip=[20,160 100x100]
      [4] scroll_frame_id=2 (PaintableWithLines(BlockContainer(anonymous)))

DisplayList:
SaveLayer@0
  CompositorWheelHitTestTarget@0 target_scroll_frame_index=0 rect=[0,0 800x600]
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=0 rect=[0,0 800x13]
  CompositorWheelHitTestTarget@2 target_scroll_frame_index=0 rect=[20,20 100x100]
  CompositorBlockingWheelEventRegion@2 rect=[20,20 100x100]
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=0 rect=[20,160 100x100]
  CompositorWheelHitTestTarget@4 target_scroll_frame_index=0 rect=[20,160 200x100]
  CompositorBlockingWheelEventRegion@4 rect=[20,160 200x100]
Restore@0