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  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 784x584
      RenderBlock {INPUT} at (2,3) size 24x16
      RenderText {#text} at (28,3) size 218x17
        text run at (28,3) width 218: "This checkbox should be checked."