That's the case, this method is not called when using a dumped container (a dumper container extends Container and not ContainerBuilder). Here is an example of a dumped code (see the unit tests below):

```php
    protected function synchronizeRequestService()
    {
        if ($this->initialized('depends_on_request')) {
            $this->get('depends_on_request')->setRequest($this->get('request', ContainerInterface::NULL_ON_INVALID_REFERENCE));
        }
    }
```

And for services without the `syncrhonized` flag, the method does not even exist.