AccumulatedVisualContext Tree:
  [1] scroll_frame_id=1 (PaintableWithLines(BlockContainer<PRE>#out))
    [2] transform=[1,0,0,1,10,10] origin=(108,108) (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 800x221]
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=0 rect=[8,8 784x200]
  CompositorWheelHitTestTarget@2 target_scroll_frame_index=0 rect=[8,8 200x200]
  FillRect@2 rect=[8,8 200x200] color=rgb(211, 211, 211)
  CompositorWheelHitTestTarget@2 target_scroll_frame_index=0 rect=[8,8 200x90]
  FillRect@2 rect=[8,8 200x90] color=rgb(173, 216, 230)
  CompositorWheelHitTestTarget@2 target_scroll_frame_index=0 rect=[33,33 100x50]
  FillRect@2 rect=[33,33 100x50] color=rgb(255, 127, 80)
  DrawGlyphRun@2 rect=[33,33 84x18] translation=[33,46.796875] color=rgb(0, 0, 0)
Restore@0