Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x38 [BFC] children: not-inline
    BlockContainer <body> at (8,13) content-size 784x17 children: not-inline
      BlockContainer <p> at (8,13) content-size 784x17 children: inline
        line 0 width: 102, height: 17, bottom: 17, baseline: 11
          frag 0 from TextNode start: 0, length: 18, rect: [8,13 102x17]
            "This is some text."
        TextNode <#text>
      BlockContainer <(anonymous)> at (8,43) content-size 784x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x38] overflow: [0,0 800x43]
    PaintableWithLines (BlockContainer<BODY>) [8,13 784x17] overflow: [8,13 784x30]
      PaintableWithLines (BlockContainer<P>) [8,13 784x17]
        TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,43 784x0]
