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 66 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 50 0+0+8] children: inline
      frag 0 from BlockContainer start: 0, length: 0, rect: [8,8 61.1875x50] baseline: 37
      BlockContainer <div.ib> at [8,8] inline-block [0+0+0 61.1875 0+0+0] [0+0+0 50 0+0+0] [BFC] children: inline
        frag 0 from BlockContainer start: 0, length: 0, rect: [9,27 17.828125x23] baseline: 18.5
        frag 1 from TextNode start: 0, length: 1, rect: [27.828125,31 8x18] baseline: 13.796875
            " "
        frag 2 from BlockContainer start: 0, length: 0, rect: [40.828125,10 23.359375x46] baseline: 37
        TextNode <#text> (not painted)
        BlockContainer <div.label> at [9,27] inline-block [0+1+0 17.828125 0+1+0] [0+1+0 23 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [9,27 17.828125x23] baseline: 17.5
              "A"
          TextNode <#text> (not painted)
        TextNode <#text> (not painted)
        BlockContainer <button> at [40.828125,10] inline-block [0+1+4 23.359375 4+1+0] [0+1+1 46 1+1+0] [BFC] children: not-inline
          BlockContainer <(anonymous)> at [40.828125,10] flex-container(column) [0+0+0 23.359375 0+0+0] [0+0+0 46 0+0+0] [FFC] children: not-inline
            BlockContainer <(anonymous)> at [40.828125,10] flex-item [0+0+0 23.359375 0+0+0] [0+0+0 46 0+0+0] [BFC] children: inline
              frag 0 from TextNode start: 0, length: 1, rect: [40.828125,10 23.359375x46] baseline: 35
                  "B"
              TextNode <#text> (not painted)
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x66]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x50]
      PaintableWithLines (BlockContainer<DIV>.ib) [8,8 61.1875x50]
        PaintableWithLines (BlockContainer<DIV>.label) [8,26 19.828125x25]
          TextPaintable (TextNode<#text>)
        TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<BUTTON>) [35.828125,8 33.359375x50]
          PaintableWithLines (BlockContainer(anonymous)) [40.828125,10 23.359375x46]
            PaintableWithLines (BlockContainer(anonymous)) [40.828125,10 23.359375x46]
              TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x66] [children: 0] (z-index: auto)
