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<?php interface Fooable { } class Foo implements Fooable {} abstract class Bar { public function dump(Foo $object) { var_dump($object); } } class Baz extends Bar { public function dump(Fooable $object) { var_dump($object); } } (new Baz)->dump(new Foo);
Output for git.master, git.master_jit, rfc.property-hooks
object(Foo)#2 (0) { }

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