layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x578
      RenderBlock {PRE} at (0,0) size 784x19
        RenderText {#text} at (0,0) size 89x19
          text run at (0,0) width 89: "Some pre text"
