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 784x584
      RenderBlock {DIV} at (0,0) size 784x18
        RenderText {#text} at (0,0) size 135x18
          text run at (0,0) width 135: "some highlighted text"
caret: position 0 of child 0 {#text} of child 0 {DIV} of body