public function testProcess() {
$container = new ContainerBuilder();
$container
->register('a', 'class');
$container
->register('b', 'class')
->setSynthetic(true)
->setPublic(true);
$container
->register('c', 'class')
->setAbstract(true);
$container
->register('d', 'class')
->setSynthetic(true);
$this
->process($container);
}