code: func (a Aggregations) Global(name string) (*AggregationSingleBucket, bool) {
  	if raw, found := a[name]; found {
  		agg := new(AggregationSingleBucket)
  		if raw == nil {
  			return agg, true
  		}
  		if err := json.Unmarshal(raw, agg); err == nil {
  			return agg, true
  		}
  	}
  	return nil, false
  }
docs: // Global returns global results.
  // See: https://www.elastic.co/guide/en/elasticsearch/reference/7.0/search-aggregations-bucket-global-aggregation.html