Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x116 children: not-inline
    BlockContainer <body> at (8,8) content-size 784x100 children: inline
      line 0 width: 100, height: 100, bottom: 100, baseline: 60
        frag 0 from SVGSVGBox start: 0, length: 0, rect: [8,8 100x100]
      SVGSVGBox <svg> at (8,8) content-size 100x100 children: not-inline
        SVGGeometryBox <path> at (28,28) content-size 60x60 children: not-inline
