Annotation Interface Nullable
nullunder some circumstance.
Leverages JSR-305 meta-annotations to indicate nullability in Java to common tools with JSR-305 support and used by Kotlin to infer nullability of Spring API.
Should be used at parameter, return value, and field level. Methods override should
@Nullable annotations unless they behave differently.
Can be used in association with
override the default non-nullable semantic to nullable.