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    BlockContainer <body> at (8,8) content-size 784x104 children: not-inline
      Box <div.container> at (9,9) content-size 250x102 flex-container(row) [FFC] children: not-inline
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ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x120]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x104]
      PaintableBox (Box<DIV>.container) [8,8 252x104]
        PaintableWithLines (BlockContainer<DIV>.box) [9,9 64.671875x102]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.box) [73.671875,9 83.328125x102]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.box) [157,9 102x102]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,112 784x0]
