title: Add Multiple Sum Aggregations in Elasticsearch
body: <p>I have a json query version of adding sum of two fields in aggregations like this -</p>
  
  <pre><code> "aggs": {
              "field1Sum": {
                  "sum": {
                      "field": "field1"
                  }
              },
              "field2Sum": {
                  "sum": {
                      "field": "field2"
                  }
              }
      }
  </code></pre>
  
  <p>I need to convert my data into this query using Java QueryBuilder for Elasticsearch</p>
  
  <p>So far -</p>
  
  <pre><code> SumBuilder s1 = AggregationBuilders.sum(field2Sum).field(field2);
   SumBuilder s2 = AggregationBuilders.sum(field1Sum).field(field1);
  </code></pre>
  
  <p>Any help?</p>