Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer  at (0,0) content-size 800x16 [BFC] children: not-inline
    BlockContainer 
 at (8,8) content-size 784x0 children: not-inline
      BlockContainer  at (8,8) content-size 784x0 children: not-inline
        BlockContainer <(anonymous)> at (8,8) content-size 500x100 positioned [BFC] children: inline
          TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer) [0,0 800x16] overflow: [0,0 800x108]
    PaintableWithLines (BlockContainer) [8,8 784x0] overflow: [8,8 784x100]
      PaintableWithLines (BlockContainer.hello) [8,8 784x0] overflow: [8,8 500x100]
        PaintableWithLines (BlockContainer(anonymous)) [8,8 500x100]