Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x40 [BFC] children: not-inline
    BlockContainer <body> at (10,10) content-size 780x22 children: not-inline
      Box <div.grid-container> at (11,11) content-size 778x20 [GFC] children: not-inline
        BlockContainer <div.grid-item.a> at (12,12) content-size 257.3125x18 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [12,12 6.34375x18] baseline: 13.796875
              "1"
          TextNode <#text>
        BlockContainer <div.grid-item.b> at (271.3125,12) content-size 516.625x18 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [271.3125,12 8.8125x18] baseline: 13.796875
              "2"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x42]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x24]
      PaintableBox (Box<DIV>.grid-container) [10,10 780x22]
        PaintableWithLines (BlockContainer<DIV>.grid-item.a) [11,11 259.3125x20]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.grid-item.b) [270.3125,11 518.625x20]
          TextPaintable (TextNode<#text>)
