code: public final Disposable subscribe() {
  		if(this instanceof MonoProcessor){
  			MonoProcessor<T> s = (MonoProcessor<T>)this;
  			s.connect();
  			return s;
  		}
  		else{
  			return subscribeWith(new LambdaMonoSubscriber<>(null, null, null, null));
  		}
  	}
docs: Subscribe to this {@link Mono} and request unbounded demand.
  <p>
  This version doesn't specify any consumption behavior for the events from the
  chain, especially no error handling, so other variants should usually be preferred.
  
  <p>
  <img class="marble" src="doc-files/marbles/subscribeIgoringAllSignalsForMono.svg" alt="">
  
  @return a new {@link Disposable} that can be used to cancel the underlying {@link Subscription}