Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 800 0+0+0] [BFC] children: not-inline
    Box <body> at [8,8] flex-container(row) [8+0+0 784 0+0+8] [8+0+0 784 0+0+8] [FFC] children: not-inline
      SVGSVGBox <svg> at [8,8] flex-item [0+0+0 784 0+0+0] [0+0+0 784 0+0+0] [SVG] children: not-inline
        SVGGeometryBox <rect> at [8,8] [0+0+0 392 0+0+0] [0+0+0 392 0+0+0] children: not-inline
      BlockContainer <(anonymous)> (not painted) [BFC] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600] overflow: [0,0 800x800]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x800]
    PaintableBox (Box<BODY>) [8,8 784x784]
      SVGSVGPaintable (SVGSVGBox<svg>) [8,8 784x784]
        SVGPathPaintable (SVGGeometryBox<rect>) [8,8 392x392]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x800] [children: 0] (z-index: auto)
