What implementation is used when Autowiring the scheduler interface in Quartz Scheduler?

Question

@Autowired
private Scheduler scheduler;

I found multiple implementations implementing the Scheduler interface (like RemoteScheduler, stdScheduler). So which one is actually being used in Spring?

When I printed out the scheduler class using

scheduler.getClass();

I saw stdScheduler. I'm wondering in what way Quartz is setting up which implementation to use.