code: func NewSearchRequestBuilder(version int, interval tsdb.Interval) *SearchRequestBuilder {
  	builder := &SearchRequestBuilder{
  		version:     version,
  		interval:    interval,
  		sort:        make(map[string]interface{}),
  		customProps: make(map[string]interface{}),
  		aggBuilders: make([]AggBuilder, 0),
  	}
  	return builder
  }
docs: // NewSearchRequestBuilder create a new search request builder