references := crefer.NewReferencesFromTuples(context.Background(),
	111, mymodule.NewWorker1("worker1"),
	222, mymodule.NewWorker2("worker2"),
)

controller := mymodule.NewSimpleController()
controller.SetReferences(context.Background(), references)
controller.Greeting(context.Background(), "world")
controller.UnsetReferences(context.Background())
controller = nil