It seems like FRZB\Component\RequestMa...on::notFound($property) can also be of type FRZB\Component\RequestMa...yMapperLocatorException; however, parameter $fallback of Fp\Functional\Option\Option::getOrThrow() does only seem to accept callable, maybe add an additional type check?
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation