Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x118 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x102 children: inline
      frag 0 from SVGSVGBox start: 0, length: 0, rect: [9,9 100x100] baseline: 102
      SVGSVGBox <svg> at (9,9) content-size 100x100 [SVG] children: not-inline
        SVGGeometryBox <rect> at (29,29) content-size 60x60 children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x118]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x102]
      SVGSVGPaintable (SVGSVGBox<svg>) [8,8 102x102]
        SVGPathPaintable (SVGGeometryBox<rect>) [29,29 60x60]
