layer at (0,0) size 800x600
  RenderView {#document} at (0,0) size 800x600
    RenderBlock {foo} at (0,0) size 800x19
      RenderParagraph (anonymous) at (0,0) size 800x19
        RenderText {#text} at (0,0) size 99x19
          text run at (0,0) width 99: "Hello World!"