Returns an entity list controller for a given entity type.
string $entity_type: The type of the entity.
Drupal\Core\Entity\EntityListControllerInterface An entity list controller.
\Drupal\Core\Entity\EntityManager
function entity_list_controller($entity_type) {
$storage = entity_get_controller($entity_type);
$entity_info = entity_get_info($entity_type);
$class = $entity_info['list_controller_class'];
return new $class($entity_type, $storage);
}