layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x600
  LayoutBlockFlow {HTML} at (0,0) size 800x600
    LayoutBlockFlow {BODY} at (8,8) size 784x584
      LayoutText {#text} at (0,0) size 15x19
        text run at (0,0) width 15: "A "
      LayoutText {#text} at (15,0) size 11x19
        text run at (15,0) width 11: "C"
hidden layer at (23,8) size 10x20
  LayoutBlockFlow (positioned) {SPAN} at (23,8) size 10x20
    LayoutText {#text} at (0,0) size 10x19
      text run at (0,0) width 10: "B"