code: func NewCompositeAggregationHistogramValuesSource(name string, interval float64) *CompositeAggregationHistogramValuesSource {
  	return &CompositeAggregationHistogramValuesSource{
  		name:     name,
  		interval: interval,
  	}
  }
docs: // NewCompositeAggregationHistogramValuesSource creates and initializes
  // a new CompositeAggregationHistogramValuesSource.