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 34 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 18 0+0+8] children: inline
      frag 0 from TextNode start: 0, length: 1, rect: [8,8 9.34375x18] baseline: 13.796875
          "a"
      frag 1 from TextNode start: 0, length: 1, rect: [17.34375,8 9.46875x18] baseline: 13.796875
          "b"
      TextNode <#text> (not painted)
      BreakNode <br> (not painted)
      TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x34]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x18]
      TextPaintable (TextNode<#text>)
      TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x34] [children: 0] (z-index: auto)
