renameMetric(mf, "grpc_server_handling_seconds")
						tpeName := "grpc_type"
						tpeVal := "unary"
						for _, m := range mf.Metric {
							m.Label = append(m.Label, &dto.LabelPair{Name: &tpeName, Value: &tpeVal})
						}
						return mf, nil
					},
				},
			},
			// etcd 3.1+ metric format for total grpc requests.
			"grpc_server_handling_seconds": {},
		},
	}
)