src/client/pkg/tracing/tracing.go
func StreamClientInterceptor() grpc.StreamClientInterceptor {
	return otgrpc.OpenTracingStreamClientInterceptor(opentracing.GlobalTracer(),
		otgrpc.IncludingSpans(addTraceIfTracingEnabled))
}
func StreamClientInterceptor() grpc.StreamClientInterceptor {
	return otgrpc.OpenTracingStreamClientInterceptor(opentracing.GlobalTracer(),
		otgrpc.IncludingSpans(addTraceIfTracingEnabled))
}
// StreamClientInterceptor returns a GRPC interceptor for non-streaming GRPC RPCs