Flow machine? about finite HOT 2 CLOSED

private function _process($stateMachine, $checkoutContext) {
        // should return only 1 transition here for flow machine
        $transitions = $stateMachine->getCurrentState()->getTransitions();

        while (count($transitions)) {
            // the current transition
            $currentTransition = array_shift($transitions);

            try {
                $stateMachine->apply($currentTransition);

                $this->_process($stateMachine, $checkoutContext);
            }
            catch (\Exception $e) {

            }
        }
}