Calling 'subscribe' in "reactive" methods
subscribe() calls in "reactive" methods.
Methods returning a publisher (including
Multi) should not call the
subscribe() method directly because it can break the reactive call chain.
Instead of using
subscribe(), consider using composition operators like
merge(), and so on.
IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Reactive Streams, 233.SNAPSHOT