[TASK] Adding missing return value in doc

Classes/Service/FormhandlerFinisherService.php

@@ -56,6 +56,8 @@ class FormhandlerFinisherService extends AbstractFinisher {
 	/**
 	 *  Redirect Formhandler input to send Email Function
 	 *  Needed to hook into Formhandler
+	 *
+	 * @return array $gp
 	 */
 	public function process() {
 		/** @var $translator LanguageService */