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layer at (0,0) size 800x84
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        RenderText {#text} at (0,0) size 419x18
          text run at (0,0) width 419: "Test passes if the \"Filler Text\" text below has a green background."
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        RenderInline {t} at (0,0) size 66x18 [bgcolor=#00FF00]
          RenderText {#text} at (0,0) size 66x18
            text run at (0,0) width 66: "Filler Text"