[5.0] Add return types on internal|final|private methods #33259
Merged
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I think some changes here can be backported to 4.4
Also, this fails with e.g.
Return value of Symfony\Component\Serializer\Normalizer\ArrayDenormalizer::denormalize() must be an object, array returned
Which means we need to update
DenormalizerInterface::denormalize()
with@return object|array
in 3.4.