Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [1,1] [0+1+0 798 0+1+0] [0+1+0 120 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 500 0+1+288] [8+1+0 102 0+1+8] children: not-inline
      BlockContainer <div.a> at [31,21] [0+1+20 458 20+1+0] [0+1+10 80 10+1+0] children: not-inline
        BlockContainer <div.b> at [72,52] [40+1+0 376 0+1+40] [30+1+0 18 0+1+30] children: inline
          InlineNode <span> at [73,52] [0+1+0 39.78125 0+1+0] [0+1+0 18 0+1+0]
            frag 0 from TextNode start: 0, length: 5, rect: [73,52 39.78125x18] baseline: 13.796875
                "Hello"
            TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x122]
    PaintableWithLines (BlockContainer<BODY>) [9,9 502x104]
      PaintableWithLines (BlockContainer<DIV>.a) [10,10 500x102]
        PaintableWithLines (BlockContainer<DIV>.b) [71,51 378x20]
          PaintableWithLines (InlineNode<SPAN>) [72,51 41.78125x20]
            TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x120] [children: 0] (z-index: auto)
