Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x320 [BFC] children: not-inline
    BlockContainer <body> at (10,10) content-size 780x302 children: not-inline
      Box <div.grid> at (11,11) content-size 778x300 [GFC] children: not-inline
        BlockContainer <div.a> at (12,12) content-size 198x298 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [12,12 9.34375x17] baseline: 13.296875
              "a"
          TextNode <#text>
        BlockContainer <div.b> at (212,12) content-size 98x298 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [212,12 9.46875x17] baseline: 13.296875
              "b"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x322]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x304]
      PaintableBox (Box<DIV>.grid) [10,10 780x302]
        PaintableWithLines (BlockContainer<DIV>.a) [11,11 200x300]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.b) [211,11 100x300]
          TextPaintable (TextNode<#text>)
