paramname">key</td><td>the key under which the <code>value</code> will be stored. It can't ne <code>NULL</code> or empty. </td></tr>
    <tr><td class="paramname">value</td><td>the string to store under the given <code>key</code>. The value can be <code>NULL</code> or empty string.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>a <a class="el" href="group__micro_types.html#ga41ae4121cf2f8e326369bbc2e44e20d7" title="the Microservice error object.">microError</a> if an error