lusters and virtual hosts,
order of the element in the array does not matter. Insert
after the selected filter or sub filter. If no filter is
selected, the specified filter will be inserted at the end
of the list.</p>

</td>
</tr>
<tr id="EnvoyFilter-Patch-Operation-INSERT_FIRST">
<td><code><a href="#EnvoyFilter-Patch-Operation-INSERT_FIRST">INSERT_FIRST</a></code></td>
<td>
<p>Insert operation on an array of named objects. This operation
is typically useful only in the context of filters or routes,
where t