Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x66 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x50 children: not-inline
      TableWrapper <(anonymous)> at (8,8) content-size 50x50 [BFC] children: not-inline
        Box <div> at (18,18) content-size 30x30 table-box [TFC] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x66]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x50]
      PaintableWithLines (TableWrapper(anonymous)) [8,8 50x50]
        PaintableBox (Box<DIV>) [8,8 50x50]
