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<p>Enable force sleep function. </p>
<dl class="section attention"><dt>Attention</dt><dd>Force sleep function is disabled by default.</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">null</td><td></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>null </dd></dl>

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