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+0 116 0+0+0] [BFC] children: not-inline
    Box <body> at [8,8] flex-container(row) [8+0+0 100 0+0+692] [8+0+0 100 0+0+8] [FFC] children: not-inline
      BlockContainer <(anonymous)> at [8,8] flex-item [0+0+0 9.46875 0+0+0] [0+0+0 100 0+0+0] [BFC] children: inline
        frag 0 from TextNode start: 0, length: 1, rect: [8,8 9.46875x18] baseline: 13.796875
            "b"
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x116]
    PaintableBox (Box<BODY>) [8,8 100x100]
      PaintableWithLines (BlockContainer(anonymous)) [8,8 9.46875x100]
        TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x116] [children: 0] (z-index: auto)
