--- /dev/null
+<?php
+
+namespace Drupal\ctools_wizard_test;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+
+/**
+ * Provides an interface for defining Example config entity entities.
+ */
+interface ExampleConfigEntityInterface extends ConfigEntityInterface {
+
+ /**
+ * Get first piece of information.
+ *
+ * @return string
+ */
+ public function getOne();
+
+ /**
+ * Get second piece of information;
+ *
+ * @return string
+ */
+ public function getTwo();
+
+}