title: Full Page Cache invalidation on cart (quote) change
body: <p>I'm trying to add a block (button) to mini cart block: either to <code>name="cart_sidebar"</code> or preferably <code>name="topCart.extra_actions"</code> as it renders it's child block automatically being of <code>core/text_list</code> type</p>
  
  <p>Everything works great except the block is not getting called on product pages due to FPC being in effect. I'm trying to extend my container from <code>Enterprise_PageCache_Model_Container_Advanced_Quote</code> class (tried <code>Enterprise_PageCache_Model_Container_Abstract</code> as well) however <code>_renderBlock</code> method is not called.</p>
  
  <p>My cache.xml seems to be correct and valid:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;config&gt;
      &lt;placeholders&gt;
          &lt;internationalcheckout_international&gt;
              &lt;block&gt;internationalcheckout/international&lt;/block&gt;
              &lt;name&gt;internationalcheckout_international&lt;/name&gt;
              &lt;placeholder&gt;INT_CHECKOUT&lt;/placeholder&gt;
              &lt;container&gt;GSX_InternationalCheckout_Model_Container_Button&lt;/container&gt;
              &lt;cache_lifetime&gt;84600&lt;/cache_lifetime&gt;
          &lt;/internationalcheckout_international&gt;
      &lt;/placeholders&gt;
  &lt;/config&gt;
  </code></pre>
  
  <p>Any help or hints are appreciated</p>