added import \ for privacy class

dta/privacy/provider.php

@@ -25,7 +25,7 @@ namespace assignsubmission_dta\privacy;
 
 defined('MOODLE_INTERNAL') || die();
 
-use core_privacy\local\metadata\collection;
+use \core_privacy\local\metadata\collection;
 use \core_privacy\local\request\writer;
 use \core_privacy\local\request\contextlist;
 use \mod_assign\privacy\assign_plugin_request_data;