--- /dev/null
+<?php
+
+namespace Drupal\bootstrap\Plugin\Preprocess;
+
+use Drupal\bootstrap\Utility\Variables;
+
+/**
+ * Pre-processes for the "item_list__dropdown" theme hook.
+ *
+ * @ingroup plugins_preprocess
+ *
+ * @BootstrapPreprocess("item_list__dropdown")
+ */
+class ItemListDropdown extends PreprocessBase implements PreprocessInterface {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function preprocessVariables(Variables $variables) {
+ parent::preprocessVariables($variables);
+
+ $variables->alignment = $variables->getContext('alignment');
+ }
+
+}