@Override
        public void outboundWireSize(long bytes) {
            outboundWireSizeUpdater.getAndAdd(this, bytes);
        }
Provides factories for {@link io.grpc.StreamTracer} that records metrics.

<p>
On the client-side, a factory is created for each call, and the factory creates a stream tracer for each attempt.

<b>Note:</b> This class uses experimental grpc-java-API features.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/metrics/MetricsClientStreamTracers.java