reactor-core/src/main/java/reactor/core/publisher/Mono.java
public static <T> Mono<T> ignoreElements(Publisher<T> source) {
		return onAssembly(new MonoIgnorePublisher<>(source));
	}
public static <T> Mono<T> ignoreElements(Publisher<T> source) {
		return onAssembly(new MonoIgnorePublisher<>(source));
	}
Create a new {@link Mono} that ignores elements from the source (dropping them),
but completes when the source completes.

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

@reactor.discard This operator discards the element from the source.

@param source the {@link Publisher} to ignore
@param <T> the source type of the ignored data

@return a new completable {@link Mono}.