Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [1,1] [0+1+0 798 0+1+0] [0+1+0 40 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 22 0+1+8] children: not-inline
      Box <div.grid-container> at [11,11] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div.a> at [12,12] [0+1+0 385.765625 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [12,12 6.34375x18] baseline: 13.796875
              "1"
          TextNode <#text> (not painted)
        BlockContainer <div.b> at [399.765625,12] [0+1+0 388.234375 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [399.765625,12 8.8125x18] baseline: 13.796875
              "2"
          TextNode <#text> (not painted)

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>.a) [11,11 387.765625x20]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.b) [398.765625,11 390.234375x20]
          TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x40] [children: 0] (z-index: auto)
