title: Is it possible to put a comment in an Elasticsearch query?
body: <p>Is it possible to put a comment into an Elasticsearch query JSON? I want to be able to add some extra text to the query that's human-readable but ignored by Elasticsearch.</p>
  
  <p>For example, if I have the following query:</p>
  
  <pre><code>{ "query": { "match_all": {} } }
  </code></pre>
  
  <p>I would like to be able to add a comment, maybe something like this:</p>
  
  <pre><code>{ "query": { "match_all": {} }, "comment": "This query matches all documents." }
  </code></pre>
  
  <p>Hacky workarounds (e.g., a query clause that has no effect on the results) would also be appreciated.</p>