Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x200 children: inline
      frag 0 from BlockContainer start: 0, length: 0, rect: [22,19 48.6875x178] baseline: 82.796875
      TextNode <#text>
      BlockContainer <button.button.border-black> at (22,19) content-size 48.6875x178 inline-block [BFC] children: not-inline
        BlockContainer <(anonymous)> at (22,19) content-size 48.6875x178 flex-container(column) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (22,29) content-size 48.6875x158 flex-item [BFC] children: not-inline
            BlockContainer <(anonymous)> at (22,29) content-size 48.6875x0 children: inline
              TextNode <#text>
            BlockContainer <div.border-black> at (32,39) content-size 28.6875x18 children: inline
              frag 0 from TextNode start: 1, length: 3, rect: [32,39 28.6875x18] baseline: 13.796875
                  "one"
              TextNode <#text>
            BlockContainer <(anonymous)> at (22,67) content-size 48.6875x0 children: inline
              TextNode <#text>
            BlockContainer <div.border-black> at (32,77) content-size 28.6875x100 children: inline
              frag 0 from TextNode start: 1, length: 3, rect: [32.125,77 28.4375x18] baseline: 13.796875
                  "two"
              TextNode <#text>
            BlockContainer <(anonymous)> at (22,187) content-size 48.6875x0 children: inline
              TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x200]
      PaintableWithLines (BlockContainer<BUTTON>.button.border-black) [8,8 76.6875x200]
        PaintableWithLines (BlockContainer(anonymous)) [22,19 48.6875x178]
          PaintableWithLines (BlockContainer(anonymous)) [22,29 48.6875x158]
            PaintableWithLines (BlockContainer(anonymous)) [22,29 48.6875x0]
            PaintableWithLines (BlockContainer<DIV>.border-black) [22,29 48.6875x38]
              TextPaintable (TextNode<#text>)
            PaintableWithLines (BlockContainer(anonymous)) [22,67 48.6875x0]
            PaintableWithLines (BlockContainer<DIV>.border-black) [22,67 48.6875x120]
              TextPaintable (TextNode<#text>)
            PaintableWithLines (BlockContainer(anonymous)) [22,187 48.6875x0]
