--- /dev/null
+<?php
+
+namespace Drupal\tour;
+
+use Drupal\Core\Plugin\DefaultLazyPluginCollection;
+
+/**
+ * A collection of tips.
+ */
+class TipsPluginCollection extends DefaultLazyPluginCollection {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected $pluginKey = 'plugin';
+
+ /**
+ * {@inheritdoc}
+ *
+ * @return \Drupal\tour\TipPluginInterface
+ */
+ public function &get($instance_id) {
+ return parent::get($instance_id);
+ }
+
+}