title: How track json request sent to Elasticsearch via elastic4s client?
body: <p>Say that I use such code:</p>
  
  <pre><code>ElasticClient client = ...
  client.execute{search in "places"-&gt;"cities" query "paris" start 5 limit 10}
  </code></pre>
  
  <p>How to see what json request was been sent to Elasticsearch?</p>