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    <h2>Contents</h2>
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      <li><a href="#format">Format</a></li>

      <li><a href="#details">Details</a></li>

      <li><a href="#source">Source</a></li>

      <li><a href="#references">References</a></li>

      <li><a href="#see-also">See also</a></li>
      
      <li><a href="#examples">Examples</a></li>
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