Lazy-loads access check services.
string $service_id: The service id of the access check service to load.
protected function loadCheck($service_id) {
if (!in_array($service_id, $this->checkIds)) {
throw new \InvalidArgumentException(sprintf('No check has been registered for %s', $service_id));
}
$this->checks[$service_id] = $this->container
->get($service_id);
}