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 [1,1] [0+1+0 798 0+1+0] [0+1+0 40 0+1+0] [BFC] children: not-inline
    Box <body> at [10,10] flex-container(row) [8+1+0 780 0+1+8] [8+1+0 22 0+1+8] [FFC] children: not-inline
      BlockContainer <div.upper> at [11,11] flex-item [0+1+0 41.78125 0+1+0] [0+1+0 20 0+1+0] [BFC] children: not-inline
        TableWrapper <(anonymous)> at [11,11] [0+0+0 41.78125 0+0+0] [0+0+0 20 0+0+0] [BFC] children: not-inline
          Box <(anonymous)> at [11,11] table-box [0+0+0 41.78125 0+0+0] [0+0+0 20 0+0+0] [TFC] children: not-inline
            Box <(anonymous)> at [11,11] table-row [0+0+0 41.78125 0+0+0] [0+0+0 20 0+0+0] children: not-inline
              BlockContainer <div.cell> at [12,12] table-cell [0+1+0 39.78125 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
                frag 0 from TextNode start: 0, length: 5, rect: [12,12 39.78125x18] baseline: 13.796875
                    "Hello"
                TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x42]
    PaintableBox (Box<BODY>) [9,9 782x24]
      PaintableWithLines (BlockContainer<DIV>.upper) [10,10 43.78125x22]
        PaintableWithLines (TableWrapper(anonymous)) [11,11 41.78125x20]
          PaintableBox (Box(anonymous)) [11,11 41.78125x20]
            PaintableBox (Box(anonymous)) [11,11 41.78125x20]
              PaintableWithLines (BlockContainer<DIV>.cell) [11,11 41.78125x20]
                TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x40] [children: 0] (z-index: auto)
