Generating nested histogram query

[sans-clue]

Please use the following questions as a guideline to help me answer your issue/question without further inquiry. Thank you.

Which version of Elastic are you using?

[x] elastic.v7 (for Elasticsearch 7.x)

I'm having difficulty generating the desired histogram query with sub aggregations.

This is the query I want to generate.

{
  "size": 0,
  "aggs": {
    "range": {
      "histogram": {
        "field": "counter",
        "interval": 2
      },
      "aggs": {
        "nested": {
          "nested": {
            "path": "deposits"
          },
          "aggs": {
            "scripts": {
              "avg": {
                "script": {
                  "lang": "painless", 
                  "source": "return doc['deposits.depositA'].value + doc['deposits.depositB'].value"
                }
              }
            }
          }
        }
      }
    }
  }
}

You'll have to excuse me if this is a dumb question, since I'm new to both elasticsearch and this package. But this is as far as I've gotten:

nested := NewNestedAggregation().Path("deposits")

scriptq := elastic.NewScriptQuery(NewScript("return doc['deposits.depositA'].value + doc['deposits.depositB'].value"))
hist := NewHistogramAggregation().Field("counter").Interval(2).SubAggregation("avg", scriptq)

client.Search().Index(indexName).Aggregation() ... // this is where I get stuck

I'm not sure of the type of aggregation I can attach in Aggregation().

I've been reviewing the _test files of this package to get some idea on what to do but a lot of this is still going over my head.

Any help would be greatly appreciated.

[sans-clue]

I solved this with:

scr := elastic.NewScript("return doc['deposits.depositA'].value + doc['deposits.depositB'].value")
avg := elastic.NewAvgAggregation().Script(scr)
nested := elastic.
    NewNestedAggregation().
    Path("deposits").
    SubAggregation("nested", avg)

agg := elastic.
    NewHistogramAggregation().
    Field("counter").
    Interval(50).
    SubAggregation("balance", nested)

src, _ := agg.Source()
d, _ := json.MarshalIndent(src, "", "  ")
fmt.Println(string(d))

which prints out:

{
  "aggregations": {
    "balance": {
      "aggregations": {
        "nested": {
          "avg": {
            "script": {
              "source": "return doc['deposits.depositA'].value + doc['deposits.depositB'].value"
            }
          }
        }
      },
      "nested": {
        "path": "deposits"
      }
    }
  },
  "histogram": {
    "field": "counter",
    "interval": 50
  }
}

Which isn't exactly the same as the query above but seems to return the same output on ES.

Can anyone let me now if this is right?