anchor.diff:      }
     }
   }
  -'
   --------------------------------------------------
  +// CONSOLE
  +// TEST[setup:twitter]
   
   Setting `size` to `0` avoids executing the fetch phase of the search making the request more efficient.
   
  
positive.code: 
  [source,js]
  --------------------------------------------------
  $ curl -XGET 'http://localhost:9200/twitter/tweet/_search' -d '{
    "size": 0,
    "aggregations": {
      "my_agg": {
  
negative.code: 
  [source,js]
  --------------------------------------------------
  GET /twitter/tweet/_search
  {
    "size": 0,
    "aggs": {
      "titles": {
        "terms": {
          "field": "title"
        },
        "meta": {
          "color": "blue"
        }
      }
    }
  }
  --------------------------------------------------
  // CONSOLE
  // TEST[setup:twitter]
  
  Then that piece of metadata will be returned in place for our `titles` terms aggregation
  
  [source,js]
  --------------------------------------------------
  {
      "aggregations": {
          "titles": {
              "meta": {
                  "color" : "blue"
              },
              "doc_count_error_upper_bound" : 0,
              "sum_other_doc_count" : 0,
              "buckets": [
              ]
          }
      },
      ...
  }
  --------------------------------------------------
  // TESTRESPONSE[s/\.\.\./"took": "$body.took", "timed_out": false, "_shards": "$body._shards", "hits": "$body.hits"/]
  