Use statements should be sorted alphabetically.

Closes #3473265

src/Plugin/field_group/FieldGroupFormatter/NavItem.php

@@ -2,9 +2,9 @@
 
 namespace Drupal\field_group_nav\Plugin\field_group\FieldGroupFormatter;
 
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\field_group\FieldGroupFormatterBase;
 use Drupal\field_group_nav\NavigationBuilderInterface;
-use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**