`@CheckReturnValue` decoration for `ApplicationContextAssert::getBean(s)` methods

I suggest to decorate ApplicationContextAssert::getBean(s) methods with a @CheckReturnValue annotation so that incomplete statements like the following are spotted by static analysis tools like SpotBugs and IntelliJ IDEA:

assertThat(context).getBean(MyService.class);

To achieve this, no additional dependency is needed and Spring Boot Test can declare its own @CheckReturnValue annotation, similarly to what AssertJ and Mockito do.

I can raise a PR with the changes if the idea is accepted.

[sdeleuze]

This could be connected to https://github.com/spring-projects/spring-framework/issues/28797 (tentatively planned for 6.1) if we extends its scope via https://github.com/jspecify/jspecify/issues/200.

[wilkinsona]

Thanks for the suggestion, @scordio. Using @CheckReturnValue sounds like a good option in this particular case. However, I wonder if we have other APIs where a similar annotation would be beneficial. A bit like nullability annotations for Kotlin, handling this inconsistently may create more problems than it solves. Flagging for team attention to see what everyone else thinks.