@Override
        public void serverCallStarted(ServerCallInfo<?, ?> callInfo) {
            this.metricsServerMeters.getServerCallCounter()
                    .withTags(Tags.of("grpc.method", this.fullMethodName,
                            INSTRUMENTATION_SOURCE_TAG_KEY, Constants.LIBRARY_NAME,
                            INSTRUMENTATION_VERSION_TAG_KEY, Constants.VERSION))
                    .increment();
        }
Returns a {@link io.grpc.ServerStreamTracer.Factory} with metrics definitions from custom
{@link MetricsServerMeters}.

@param meters The MetricsServerMeters used to configure the metrics definitions.
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/metrics/MetricsServerStreamTracers.java