code: public final <V> Flux<V> thenMany(Publisher<V> other) {
  		@SuppressWarnings("unchecked")
  		Flux<V> concat = (Flux<V>)Flux.concat(ignoreElement(), other);
  		return Flux.onAssembly(concat);
  	}
docs: Let this {@link Mono} complete then play another {@link Publisher}.
  <p>
  In other words ignore element from this mono and transform the completion signal into a
  {@code Flux<V>} that will emit elements from the provided {@link Publisher}.
  
  <p>
  <img class="marble" src="doc-files/marbles/thenManyForMono.svg" alt="">
  
  @reactor.discard This operator discards the element from the source.
  
  @param other a {@link Publisher} to emit from after termination
  @param <V> the element type of the supplied Publisher
  
  @return a new {@link Flux} that emits from the supplied {@link Publisher} after
  this Mono completes.