public ServerStreamTracer.Factory getMetricsServerTracerFactory(MeterRegistry registry) {
        return new MetricsServerTracerFactory(registry);
    }
Returns a {@link io.grpc.ServerStreamTracer.Factory} with default metrics definitions.

@param registry The MeterRegistry used to create the metrics.
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/metrics/MetricsServerStreamTracers.java