merge semantics with the existing proto in the path.</p>

</td>
</tr>
<tr id="EnvoyFilter-Patch-filter_class">
<td><div class="field"><div class="name"><code><a href="#EnvoyFilter-Patch-filter_class">filterClass</a></code></div>
<div class="type"><a href="#EnvoyFilter-Patch-FilterClass">FilterClass</a></div>
</div></td>
<td>
<p>Determines the filter insertion order.</p>

</td>
</tr>
</tbody>
</table>
</section>
<h4 id="EnvoyFilter-Patch-Operation">Operation</h4>
<section>
<p>Operation denotes how the patch 