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<?php foreach ((new ReflectionClass('\DateTime'))->getMethods() as $method) { if ($method->getName() == 'modify') { $returnType = $method->getTentativeReturnType(); if ($returnType instanceof ReflectionUnionType) { foreach ($returnType->getTypes() as $type) { var_dump($type->getName()); } } } }
Output for git.master, git.master_jit
Output for rfc.property-hooks
string(8) "DateTime" string(5) "false"

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