d class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structkv_watch_options.html">kvWatchOptions</a> *&#160;</td>
          <td class="paramname"><em>opts</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns a watcher for any updates to keys that match the <code>keys</code> argument, which could include wildcard.</p>
<p>A <code>NULL</code>