import java.util.List; import java.util.Optional; import java.util.function.Function; import java.util.function.Predicate; import java.util.stream.Collectors; class OptIssue { public static List getMyObject(List events){ Predicate isPresent = event -> event.getMethod().isPresent(); // No warning -- IDEA-224757 Function getItem = e -> e.getMethod().get(); return events.stream().filter(isPresent).map(getItem).collect(Collectors.toList()); } private static class MyObject { } private static class EventObject { public Optional getMethod() { return null; } } }