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  RenderCanvas 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
      RenderImage {IMG} at (0,0) size 24x24
      RenderText {TEXT} at (24,10) size 221x18
        text run at (24,10) width 221: " This text should only appear once."