Distinct High Level Rest Client Elastic Query

Question

How to use High Level Rest Client to find documents by distinct value. Documentation talks about Aggregation framework for finding distinct documents by field. But I could not find any example using High Level Rest Client. How can I get distinct documents by field.

BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery()
                .must(QueryBuilders.matchQuery("Field1", "Value1"))
searchSourceBuilder.query(boolQueryBuilder);

searchSourceBuilder.aggregation(????)

Data

{
    ..
    ..

      "Field1" : "Value1",
      "Field2" : "Value2"
    },
    {
      "Field1" : "Value1",
      "Field2" : "Value21"
    }
}

Expected Output (any document with "Field1" : "Value1")

{
    ..
    ..

      "Field1" : "Value1",
      "Field2" : "Value2"
    }
}

Elastic Search Query for Distinct Nested Values

Elastic Aggregation

Code below gives the same result:

   AggregationBuilder termAggregationBuilder = AggregationBuilders
                .terms("someName")
                .field("Field1");
   AggregationBuilder topHitsAggregationBuilder = AggregationBuilders
                .topHits("someOtherName")
                .fetchSource(includeFields, excludeFields);
   searchSourceBuilder.aggregation(termAggregationBuilder.subAggregation(topHitsAggregationBuilder));