I have the following code: https://phpstan.org/r/9eb062dd-1670-4e01-b634-380b80313cc4

Can someone explain to me why the message "Method HelloWorld::buildViews() never returns non-empty-list so it can be removed from the return type." is generated when using the array_map method? As can be seen, the $views parameter has the PHPStan type *NEVER* for some reason. I would expect it to be non-empty-list<View>, like the $views2 parameter.

Edit: when I make the buildViews method public instead of private the issue is resolved.