Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 100 0+0+0] [BFC] children: not-inline
    Box <body> at [0,0] flex-container(column) [0+0+0 800 0+0+0] [0+0+0 100 0+0+0] [FFC] children: not-inline
      SVGSVGBox <svg> at [0,0] flex-item [0+0+0 200 0+0+0] [0+0+0 100 0+0+0] [SVG] children: not-inline
        SVGGeometryBox <rect> at [0,0] [0+0+0 200 0+0+0] [0+0+0 100 0+0+0] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x100]
    PaintableBox (Box<BODY>) [0,0 800x100]
      SVGSVGPaintable (SVGSVGBox<svg>) [0,0 200x100]
        SVGPathPaintable (SVGGeometryBox<rect>) [0,0 200x100]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x100] (z-index: auto)
