public function testStrictFlagIsPreserved() {
$container = new ContainerBuilder();
$container
->register('bar');
$def = $container
->register('foo')
->addArgument(new Reference('bar', ContainerInterface::NULL_ON_INVALID_REFERENCE, false));
$this
->process($container);
$this
->assertFalse($def
->getArgument(0)
->isStrict());
}