google.golang.org/grpc/experimental/stats.MetricDescriptor.OptionalLabels (field)
6 uses
google.golang.org/grpc/experimental/stats (current package)
metricregistry.go#L56: OptionalLabels []string
google.golang.org/grpc
clientconn.go#L111: OptionalLabels: []string{"grpc.lb.backend_service", "grpc.lb.locality", "grpc.disconnect_error"},
clientconn.go#L119: OptionalLabels: []string{"grpc.lb.backend_service", "grpc.lb.locality"},
clientconn.go#L127: OptionalLabels: []string{"grpc.lb.backend_service", "grpc.lb.locality"},
clientconn.go#L135: OptionalLabels: []string{"grpc.lb.backend_service", "grpc.security_level", "grpc.lb.locality"},
google.golang.org/grpc/internal/stats
metrics_recorder_list.go#L54: if got, want := len(labelsRecv), len(desc.Labels)+len(desc.OptionalLabels); got != want {