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<?php abstract class Base { protected function doit() { throw new \RuntimeException('Not implemented'); } } class Closed extends Base { protected function doit() { echo 'done!'; } } class Opener extends Base { public function execute(Closed $closed) { $closed->doit(); } } $closed = new Closed(); $opener = new Opener(); $opener->execute($closed);
Output for git.master, git.master_jit, rfc.property-hooks
done!

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