Reports missing StepVerifier terminal calls.
Initiating Publisher subscriptions and assertions requires calling a terminal verification method,
such as verify(), verifyComplete(), and so on.
Example:
StepVerifier.create(Flux.just(1,2,3)).expectNext(1);
After the quick-fix is applied:
StepVerifier.create(Flux.just(1,2,3)).expectNext(1).verifyComplete();