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<?php class FooParent {} class FooChild extends FooParent {}; interface BarInterface { public function getProvider(): FooParent; } class BarImplementation { public function getProvider(): FooChild { return new FooChild(); } } $a = new BarImplementation(); var_dump($a->getProvider());
Output for git.master_jit, git.master, rfc.property-hooks
object(FooChild)#2 (0) { }

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