google.golang.org/grpc/experimental/stats.MetricDescriptor.OptionalLabels (field)

2 uses

	google.golang.org/grpc/experimental/stats (current package)
		metricregistry.go#L56: 	OptionalLabels []string

	google.golang.org/grpc/internal/stats
		metrics_recorder_list.go#L52: 	if got, want := len(labelsRecv), len(desc.Labels)+len(desc.OptionalLabels); got != want {