Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x166 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x150 children: inline
      frag 0 from SVGSVGBox start: 0, length: 0, rect: [8,8 300x150] baseline: 150
      SVGSVGBox <svg> at (8,8) content-size 300x150 [SVG] children: inline
        SVGGraphicsBox <symbol> at (8,8) content-size 300x150 [BFC] children: inline
          InlineNode <set#set>
            TextNode <#text>
        TextNode <#text>
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x166]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x150]
      SVGSVGPaintable (SVGSVGBox<svg>) [8,8 300x150]
        SVGGraphicsPaintable (SVGGraphicsBox<symbol>) [8,8 300x150]
          PaintableWithLines (InlineNode<set>#set)
