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  BlockContainer <html> at (0,0) content-size 800x16 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x0 children: not-inline
      BlockContainer <div.hello> at (8,8) content-size 784x0 children: not-inline
        BlockContainer <(anonymous)> at (8,8) content-size 500x100 positioned [BFC] children: inline
          line 0 width: 0, height: 21.835937, bottom: 21.835937, baseline: 16.914062
            frag 0 from TextNode start: 0, length: 0, rect: [8,8 0x21.835937]
              ""
          TextNode <#text>
