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<?php interface MyInterface { public function doSomethingAndGetNextStep(): ?MyInterface; } class MyService implements MyInterface { public function doSomethingAndGetNextStep(): null { // do something here, like all other implementations // final one in chain return null; } } $a = new MyService(); var_dump($a->doSomethingAndGetNextStep());
Output for git.master_jit, git.master
NULL

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