go.opentelemetry.io/otel/api/metric.BatchObserverMust.NewFloat64SumObserver (method)

one use

	go.opentelemetry.io/otel/api/metric (current package)
		must.go#L196: func (bm BatchObserverMust) NewFloat64SumObserver(name string, oos ...InstrumentOption) Float64SumObserver {