Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x39 [BFC] children: not-inline
    Box <body> at (10,10) content-size 780x21 flex-container(row) [FFC] children: not-inline
      BlockContainer <div.upper> at (11,11) content-size 41.78125x19 flex-item [BFC] children: not-inline
        TableWrapper <(anonymous)> at (11,11) content-size 41.78125x19 [BFC] children: not-inline
          Box <(anonymous)> at (11,11) content-size 41.78125x19 table-box [TFC] children: not-inline
            Box <(anonymous)> at (11,11) content-size 41.78125x19 table-row children: not-inline
              BlockContainer <div.cell> at (12,12) content-size 39.78125x17 table-cell [BFC] children: inline
                frag 0 from TextNode start: 0, length: 5, rect: [12,12 39.78125x17] baseline: 13.296875
                    "Hello"
                TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x41]
    PaintableBox (Box<BODY>) [9,9 782x23]
      PaintableWithLines (BlockContainer<DIV>.upper) [10,10 43.78125x21]
        PaintableWithLines (TableWrapper(anonymous)) [11,11 41.78125x19]
          PaintableBox (Box(anonymous)) [11,11 41.78125x19]
            PaintableBox (Box(anonymous)) [11,11 41.78125x19]
              PaintableWithLines (BlockContainer<DIV>.cell) [11,11 41.78125x19]
                TextPaintable (TextNode<#text>)
