AccumulatedVisualContext Tree:
  [0] transform=[1,0,0,1,0,0] origin=(0,0) (ViewportPaintable(Viewport<#document>))
    [1] scroll (PaintableWithLines(BlockContainer<PRE>#out))

DisplayList:
SaveLayer@0
  CompositorWheelHitTestTarget@0 target_scroll_node_index=0 rect=[0,0 800x600]
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[0,0 800x281]
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,8 784x260]
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,8 140x20]
  Save@1
    AddClipPath@1 path_bounding_rect=[8,8 140x20]
    StrokePath@1 path_bounding_rect=[-2,8 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,28 140x20]
  Save@1
    AddClipPath@1 path_bounding_rect=[8,28 140x20]
    StrokePath@1 path_bounding_rect=[-2,28 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,48 140x100]
  Save@1
    AddClipPath@1 path_bounding_rect=[128,48 20x100]
    StrokePath@1 path_bounding_rect=[128,38 20x120] thickness=20 color=rgb(0, 0, 255) dash_array_size=2 dash_offset=25.00
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,128 140x20]
    StrokePath@1 path_bounding_rect=[-2,128 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,48 20x100]
    StrokePath@1 path_bounding_rect=[8,38 20x120] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=25.00
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,48 140x20]
    StrokePath@1 path_bounding_rect=[-2,48 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,148 140x100]
  Save@1
    AddClipPath@1 path_bounding_rect=[128,148 20x100]
    StrokePath@1 path_bounding_rect=[128,138 20x120] thickness=20 color=rgb(0, 0, 255) dash_array_size=2 dash_offset=16.67
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,228 140x20]
    StrokePath@1 path_bounding_rect=[-2,228 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,148 20x100]
    StrokePath@1 path_bounding_rect=[8,138 20x120] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=16.67
  Restore@1
  Save@1
    AddClipPath@1 path_bounding_rect=[8,148 140x20]
    StrokePath@1 path_bounding_rect=[-2,148 160x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=17.50
  Restore@1
  CompositorWheelHitTestTarget@1 target_scroll_node_index=0 rect=[8,248 100x20]
  StrokePath@1 path_bounding_rect=[-2,248 120x20] thickness=20 color=rgb(255, 0, 0) dash_array_size=2 dash_offset=25.00
Restore@0

