I didn't read all of it, but I was wondering: In a virtual loom thread, am I allowed to call currentThread().sleep(...); or will it block the system thread? Or

I didn't read all of it, but I was wondering: In a virtual loom thread, am I allowed to call currentThread().sleep(...); or will it block the system thread? Or is there some magic like currentThread().sleepAndThen(..., ()->{}); ?