Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 172 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 156 0+0+8] children: not-inline
      BlockContainer <(anonymous)> at [8,8] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.wrapper> at [8,8] [0+0+0 784 0+0+0] [0+0+0 156 0+0+0] [GFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)
        BlockContainer <div.box.a> at [28,38] [0+0+20 60 20+0+0] [0+0+20 28 20+0+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [28,38 21.40625x28] baseline: 21.1875
              "A"
          TextNode <#text> (not painted)
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)
        BlockContainer <div.box.b> at [28,116] [0+0+20 60 20+0+0] [0+0+20 28 20+0+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [28,116 14.015625x28] baseline: 21.1875
              "B"
          TextNode <#text> (not painted)
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x172]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x156]
      PaintableWithLines (BlockContainer(anonymous)) [8,8 784x0]
      PaintableBox (Box<DIV>.wrapper) [8,8 784x156]
        PaintableWithLines (BlockContainer<DIV>.box.a) [8,18 100x68]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.box.b) [8,96 100x68]
          TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x172] [children: 0] (z-index: auto)
