</span><span class="pi">:</span>
      <span class="na">headers</span><span class="pi">:</span>
        <span class="na">cookie</span><span class="pi">:</span>
          <span class="na">regex</span><span class="pi">:</span> <span class="s2">"</span><span class="s">^(.*?;)?(user=jason)(;.*)?$"</span>
  <span class="s">...</span>
</code></pre></div></div><h3 id="split-traffic-between-service-versions">Split traffic between service versions</h3><p>Each route rule identifies one or more weighted backends to ca