pub fn with_service_name(mut self, name: impl Into<String>) -> Self {
        self.use_all_service_names = false;
        self.service_names.push(name.into());
        self
    }
Advertise a fully-qualified gRPC service name.

If not called, then all services present in the registered file descriptor sets
will be advertised.
tonic-reflection/src/server/mod.rs