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<?php $interval = new \DateInterval('P10M'); var_dump(property_exists($interval, 'm')); $x = $interval; var_dump(property_exists($interval, 'm')); echo '¯\_(ツ)_/¯' . PHP_EOL;
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) ¯\_(ツ)_/¯

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