"grpc_method":  "method",
							"grpc_service": "service",
						})
						return mf, nil
					},
				},
			},
			// etcd 3.1+ metric format for total grpc requests.
			"grpc_server_handled_total": {
				rewriters: []rewriteFunc{
					// Export the metric exactly as-is. For 3.1+ metrics, we will
					// pass all metrics directly through.
					identity,