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layer at (0,0) size 800x600
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          text run at (0,0) width 307: "You should see a 100x100 green square below. "
          text run at (307,0) width 242: "If you see any red, the test has failed. "
          text run at (549,0) width 149: "This test is checking for"
          text run at (0,19) width 160: "visibility:collapse support."
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