</em> is also called for every allocated block in every area (with <code>block!=NULL</code>). return <em>false</em> from this function to stop visiting early. </td></tr>
    <tr><td class="paramname">arg</td><td>Extra argument passed to <em>visitor</em>. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><em>true</em> if all areas and blocks were visited. </dd></dl>

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