Index: sites/all/modules/google_tag/google_tag.module
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- sites/all/modules/google_tag/google_tag.module	(revision )
+++ sites/all/modules/google_tag/google_tag.module	(revision )
@@ -37,6 +37,18 @@
 }
 
 /**
+ * Implements hook_variable_info().
+ */
+function google_tag_variable_info($options) {
+  $variables['google_tag_container_id'] = array(
+    'title' => t('Google tag container id'),
+    'description' => t('The ID assigned by Google Tag Manager (GTM) for this website container. To get a container ID, sign up for GTM and create a container for your website.'),
+    'localize' => TRUE,
+  );
+  return $variables;
+}
+
+/**
  * Implements hook_permission().
  */
 function google_tag_permission() {