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 68 0+1+0] [BFC] children: not-inline
    Box <body.flex> at [10,10] flex-container(row) [8+1+0 38.84375 0+1+749.15625] [8+1+0 50 0+1+8] [FFC] children: not-inline
      BlockContainer <div.item> at [11,11] flex-item [0+1+0 36.84375 0+1+0] [0+1+0 48 0+1+0] [BFC] children: inline
        frag 0 from TextNode start: 0, length: 5, rect: [11,11 36.84375x18] baseline: 13.796875
            "hello"
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x70]
    PaintableBox (Box<BODY>.flex) [9,9 40.84375x52]
      PaintableWithLines (BlockContainer<DIV>.item) [10,10 38.84375x50]
        TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x68] [children: 0] (z-index: auto)
