Composite buckets Order

Elastic Stack Elasticsearch
1

Hi, I have the following document
fieldA: String,
fieldB: boolean,
fieldC: String,
fieldD: String,
fieldE: String
I using composite aggregation and sub-aggregations. I want to sort the composite buckets contain all the items that have fieldB set to true (in this case min_agg returns 1) and then on fieldC by name

GET _search
{
  "aggregations": {
    "agg": {
      "aggregations": {
        "min_agg": {
          "min": {
            "field": "fieldB"
          }
        },
        "term_agg": {
          "terms": {
            "field": "fieldC.keyword"
          }
        },
        "info": {
          "top_hits": {
            "size": 1,
            "_source": {
              "includes": [
                "fieldB",
                "fieldC",
                "fieldD"
              ]
            }
          }
        }
      },
      "composite": {
        "sources": [
          {
            "fieldA": {
              "terms": {
                "field": "fieldA.keyword"
              }
            }
          }
        ]
      }
    }
  },
  "size": 0
}