-        $collection->add_database_table('surveypro_answer', $data, 'privacy:metadata:answer');
+        $items->add_database_table('surveypro_answer', $data, 'privacy:metadata:answer');

         // Link to subplugins.
-        $collection->add_subsystem_link('core_files', [], 'privacy:metadata:uploadedfiles');
+        $items->add_subsystem_link('core_files', [], 'privacy:metadata:uploadedfiles');

         // Link to subplugins.
-        $collection->add_plugintype_link('surveyprofield', [], 'privacy:metadata:surveyprofieldpluginsummary');
-        $collection->add_plugintype_link('surveyproformat', [], 'privacy:metadata:surveyproformatpluginsummary');
-        $collection->add_plugintype_link('surveyprotemplate', [], 'privacy:metadata:surveyprotemplatepluginsummary');
-        $collection->add_plugintype_link('surveyproreport', [], 'privacy:metadata:surveyproreportpluginsummary');
+        $items->add_plugintype_link('surveyprofield', [], 'privacy:metadata:surveyprofieldpluginsummary');
+        $items->add_plugintype_link('surveyproformat', [], 'privacy:metadata:surveyproformatpluginsummary');
+        $items->add_plugintype_link('surveyprotemplate', [], 'privacy:metadata:surveyprotemplatepluginsummary');
+        $items->add_plugintype_link('surveyproreport', [], 'privacy:metadata:surveyproreportpluginsummary');

-        return $collection;
+        return $items;