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 56 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 40 0+0+8] children: not-inline
      Box <div> at [8,8] flex-container(column) [0+0+0 784 0+0+0] [0+0+0 22 0+0+0] [FFC] children: not-inline
        BlockContainer <button> at [13,10] flex-item [0+1+4 774 4+1+0] [0+1+1 18 1+1+0] [BFC] children: not-inline
          BlockContainer <(anonymous)> at [13,10] flex-container(column) [0+0+0 774 0+0+0] [0+0+0 18 0+0+0] [FFC] children: not-inline
            BlockContainer <(anonymous)> at [13,10] flex-item [0+0+0 774 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline
              frag 0 from TextNode start: 0, length: 3, rect: [386.421875,10 27.15625x18] baseline: 13.796875
                  "foo"
              TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,30] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div> at [8,30] flex-container(column) [0+0+0 784 0+0+0] [0+0+0 18 0+0+0] [FFC] children: not-inline
        BlockContainer <span> at [8,30] flex-item [0+0+0 784 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 3, rect: [8,30 27.640625x18] baseline: 13.796875
              "bar"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,48] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x56]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x40]
      PaintableBox (Box<DIV>) [8,8 784x22]
        PaintableWithLines (BlockContainer<BUTTON>) [8,8 784x22]
          PaintableWithLines (BlockContainer(anonymous)) [13,10 774x18]
            PaintableWithLines (BlockContainer(anonymous)) [13,10 774x18]
              TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,30 784x0]
      PaintableBox (Box<DIV>) [8,30 784x18]
        PaintableWithLines (BlockContainer<SPAN>) [8,30 784x18]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,48 784x0]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x56] [children: 0] (z-index: auto)
