FEATURE #1528: add button for creating slider from gallery

modules/ContactForm/Handlers/ContactForm.php

@@ -169,4 +169,16 @@ class ContactForm extends Handler
     {
         // TODO: Implement install() method.
     }
+
+    /**
+     * Load some extra data for content management form?
+     *
+     * @param Content $content
+     *
+     * @return mixed
+     */
+    public static function loadExtraData(Content $content)
+    {
+        // nothing to do
+    }
 }