Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x62.5 [BFC] children: not-inline
    BlockContainer <body> at (2,2) content-size 796x60.5 children: inline
      line 0 width: 34, height: 28.5, bottom: 28.5, baseline: 28.5
        frag 0 from BlockContainer start: 0, length: 0, rect: [4,3 30x30]
      line 1 width: 32, height: 28.5, bottom: 60.5, baseline: 28.5
        frag 0 from BlockContainer start: 0, length: 0, rect: [3,35 30x30]
      BlockContainer <div.clump> at (4,3) content-size 30x30 inline-block [BFC] children: not-inline
      BreakNode <br>
      BlockContainer <div.clump> at (3,35) content-size 30x30 inline-block [BFC] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x64.5] overflow: [1,1 798x64]
    PaintableWithLines (BlockContainer<BODY>) [1,1 798x62.5] overflow: [2,2 796x63]
      PaintableWithLines (BlockContainer<DIV>.clump) [3,2 32x32]
      PaintableWithLines (BlockContainer<DIV>.clump) [2,34 32x32]
