="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">m</td><td>Map to iterate </td></tr>
    <tr><td class="paramname">it_out</td><td>Receives iterator; becomes invalid if map is modified </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if non-empty and iterator valid, 0 if empty </dd></dl>

</div>
</div>
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