As specified in this custom nullability proposal and as discussed with Jetbrains team, methods overridding parent one with @Nullable return values annotation require the @Nullable annotation to be present at the same level than @Override to get nullable qualifier taken in account in the overridden method.
This is currently not done in most places, so this need to be fixed to get null-safety handled correctly by IDEA and Kotlin.
Issue Links:
#20099 Introduce null-safety of Spring Framework API
Sébastien Deleuze opened SPR-15869 and commented
As specified in this custom nullability proposal and as discussed with Jetbrains team, methods overridding parent one with
@Nullablereturn values annotation require the@Nullableannotation to be present at the same level than@Overrideto get nullable qualifier taken in account in the overridden method.This is currently not done in most places, so this need to be fixed to get null-safety handled correctly by IDEA and Kotlin.
Issue Links:
Referenced from: commits 73cf07e, 47a7475
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