reactor-core/src/main/java/reactor/core/publisher/Mono.java
public final Mono<T> delaySubscription(Duration delay, Scheduler timer) {
		return delaySubscription(Mono.delay(delay, timer));
	}
public final Mono<T> delaySubscription(Duration delay, Scheduler timer) {
		return delaySubscription(Mono.delay(delay, timer));
	}
Delay the {@link Mono#subscribe(Subscriber) subscription} to this {@link Mono} source until the given
{@link Duration} elapses.

<p>
<img class="marble" src="doc-files/marbles/delaySubscriptionForMono.svg" alt="">

@param delay {@link Duration} before subscribing this {@link Mono}
@param timer a time-capable {@link Scheduler} instance to run on

@return a delayed {@link Mono}