Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x37 [BFC] children: not-inline
    BlockContainer <body> at (10,10) content-size 780x19 children: not-inline
      Box <div.container> at (11,11) content-size 800x17 flex-container(row) [FFC] children: not-inline
        BlockContainer <(anonymous)> at (392.203125,11) content-size 37.578125x17 flex-item [BFC] children: inline
          frag 0 from TextNode start: 0, length: 4, rect: [392.203125,11 37.578125x17] baseline: 13.296875
              "Text"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600] overflow: [0,0 812x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x39] overflow: [1,1 811x37]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x21] overflow: [10,10 802x19]
      PaintableBox (Box<DIV>.container) [10,10 802x19]
        PaintableWithLines (BlockContainer(anonymous)) [392.203125,11 37.578125x17]
          TextPaintable (TextNode<#text>)
