--- /dev/null
+<?php
+
+namespace Drupal\metatag_google_cse\Plugin\metatag\Tag;
+
+use \Drupal\metatag\Plugin\metatag\Tag\MetaNameBase;
+
+/**
+ * Provides a plugin for the 'thumbnail' meta tag.
+ *
+ * @MetatagTag(
+ * id = "thumbnail",
+ * label = @Translation("Thumbnail"),
+ * description = @Translation("Use a url of a valid image."),
+ * name = "thumbnail",
+ * group = "google_cse",
+ * weight = 0,
+ * type = "uri",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class Thumbnail extends MetaNameBase {
+ // Nothing here yet. Just a placeholder class for a plugin.
+}