title: Elasticsearch: Return only nested inner_hits
body: <p>I have the following query:</p>
  
  <pre><code>GET /networkcollection/branch_routers/_search/
  {
    "query": {
      "nested": {
        "path": "queries",
        "query": {
          "bool": {
            "must": [
              { "match": 
                { "queries.dateQuery": "20160101T200000.000Z" }
              }
            ]
          }
        },
        "inner_hits" : {}
      }
    }
  }
  </code></pre>
  
  <p>This returns both the "hits" object (the entire document), as well as the "inner_hits" object (nested inside of hits).</p>
  
  <p>Is there a way to for me to only return the matched "queries" element(s) which appear in the "inner_hits" results, without getting the whole document?</p>