private function loadStates(StateMachineInterface $stateMachine)
{
$resolver = new OptionsResolver();
$resolver->setDefaults(array('type' => StateInterface::TYPE_NORMAL, 'properties' => array()));
$resolver->setAllowedValues('type', array(StateInterface::TYPE_INITIAL, StateInterface::TYPE_NORMAL, StateInterface::TYPE_FINAL));
foreach ($this->config['states'] as $state => $config) {
$config = $resolver->resolve($config);
$stateMachine->addState(new State($state, $config['type'], array(), $config['properties']));
}
}