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<?php interface Shiter { public function foo(Shiter $shit); } class Bbk implements Shiter { public function foo(Shiter $shit): Shiter { return new self(); } } $bbk = new Bbk(); $result = $bbk->foo(new Bbk()); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
object(Bbk)#3 (0) { }

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