span>
    <span class="na">source</span><span class="pi">:</span>
      <span class="na">name</span><span class="pi">:</span> <span class="s">reviews</span>
      <span class="na">labels</span><span class="pi">:</span>
        <span class="na">version</span><span class="pi">:</span> <span class="s">v2</span>
  <span class="s">...</span>
</code></pre></div></div><p><em>3. Select rule based on HTTP headers</em>. For example, the following rule will only apply to an incoming request if it includes a “cookie�