Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x64 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x48 children: not-inline
      Box <div.a> at (8,8) content-size 784x48 [GFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        BlockContainer <div.b> at (8,8) content-size 48x48 [BFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        BlockContainer <div.c> at (56,8) content-size 48x48 [BFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
      BlockContainer <(anonymous)> at (8,56) content-size 784x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x64]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x48]
      PaintableBox (Box<DIV>.a) [8,8 784x48]
        PaintableWithLines (BlockContainer<DIV>.b) [8,8 48x48]
        PaintableWithLines (BlockContainer<DIV>.c) [56,8 48x48]
      PaintableWithLines (BlockContainer(anonymous)) [8,56 784x0]
