Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x22 children: not-inline
      BlockContainer <div#begin> at (8,8) content-size 784x2 children: not-inline
      BlockContainer <(anonymous)> at (8,10) content-size 784x18 children: inline
        BreakNode <br>
      BlockContainer <div#end> at (8,28) content-size 784x2 children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x22]
      PaintableWithLines (BlockContainer<DIV>#begin) [8,8 784x2]
      PaintableWithLines (BlockContainer(anonymous)) [8,10 784x18]
      PaintableWithLines (BlockContainer<DIV>#end) [8,28 784x2]
