 href="polymer_app_layout/HtmlDocument/elementFromPoint.html">elementFromPoint</a>
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      <li><a href="polymer_app_layout/HtmlDocument/exitFullscreen.html">exitFullscreen</a>
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      <li>exitPointerLock
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      <li><a href="polymer_app_layout/HtmlDocument/getCssCanvasContext.html">getCssCanvasContext</a>
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      <li>getElementById
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      <li>getElementsByTagName
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      <li>hasChild