trying to fix jsdoc error

themes/_vendor/js/mock.js

@@ -47,7 +47,8 @@ String.prototype.capitalize = function() {
  * created by the theme's code, but rather by the {@link LightDMGreeter} class.
  * @interface
  */
-let LightDMSession = ({comment, key, name}) => ({
+let LightDMSession = function( { comment, key, name } ) {
+	return {
 		/**
 		 * The comment for the session.
 		 * @type {String}
@@ -68,7 +69,8 @@ let LightDMSession = ({comment, key, name}) => ({
 		 * @readonly
 		 */
 		name
-});
+	}
+};
 
 
 /**
@@ -76,7 +78,8 @@ let LightDMSession = ({comment, key, name}) => ({
  * created by the theme's code, but rather by the {@link LightDMGreeter} class.
  * @interface
  */
-let LightDMLanguage = ({code, name, territory}) => ({
+let LightDMLanguage = function( { code, name, territory } ) {
+	return {
 		/**
 		 * The code for the language.
 		 * @type {String}
@@ -97,7 +100,8 @@ let LightDMLanguage = ({code, name, territory}) => ({
 		 * @readonly
 		 */
 		territory
-});
+	}
+};
 
 
 /**
@@ -105,7 +109,8 @@ let LightDMLanguage = ({code, name, territory}) => ({
  * objects are not created by the theme's code, but rather by the {@link LightDMGreeter} class.
  * @interface
  */
-let LightDMLayout = ({description, name, short_description}) => ({
+let LightDMLayout = function( { description, name, short_description } ) {
+	return {
 		/**
 		 * The description for the layout.
 		 * @type {String}
@@ -126,7 +131,8 @@ let LightDMLayout = ({description, name, short_description}) => ({
 		 * @readonly
 		 */
 		short_description
-});
+	}
+};
 
 
 /**
@@ -134,7 +140,8 @@ let LightDMLayout = ({description, name, short_description}) => ({
  * objects are not created by the theme's code, but rather by the {@link LightDMGreeter} class.
  * @interface
  */
-let LightDMUser = ( user_info ) => ({
+let LightDMUser = function( user_info ) {
+	return {
 		/**
 		 * The display name for the user.
 		 * @type {String}
@@ -206,7 +213,8 @@ let LightDMUser = ( user_info ) => ({
 		 * @readonly
 		 */
 		real_name: user_info.real_name || ''
-});
+	}
+};
 
 
 /**
@@ -253,7 +261,12 @@ class GreeterUtil {
 	 * @returns {String}
 	 */
 	txt2html( text ) {
-		let entities_map = { '"': '&quot;', '&': '&amp;', '<': '&lt;', '>': '&gt;' };
+		let entities_map = {
+			'"': '&quot;',
+			'&': '&amp;',
+			'<': '&lt;',
+			'>': '&gt;'
+		};
 
 		return text.replace(/[\"&<>]/g, a => entities_map[a]);
 	}
@@ -688,7 +701,13 @@ class LightDMGreeter {
  */
 MockData = () => ({
 	greeter: {
-		default_values: {string: () => '', int: () => 0, bool: () => false, list: () => [], 'null': () => null},
+		default_values: {
+			string: () => '',
+			int: () => 0,
+			bool: () => false,
+			list: () => [],
+			'null': () => null
+		},
 		hostname: 'Mock Greeter',
 		properties: {
 			string: ['authentication_user', 'autologin_user', 'default_session', 'hostname', 'num_users'],
@@ -703,21 +722,65 @@ MockData = () => ({
 		}
 	},
 	languages: [
-		{name: 'English', code: 'en_US.utf8', territory: 'USA'},
-		{name: 'Catalan', code: 'ca_ES.utf8', territory: 'Spain'},
-		{name: 'French', code: 'fr_FR.utf8', territory: 'France'}
+		{
+			name: 'English',
+			code: 'en_US.utf8',
+			territory: 'USA'
+		},
+		{
+			name: 'Catalan',
+			code: 'ca_ES.utf8',
+			territory: 'Spain'
+		},
+		{
+			name: 'French',
+			code: 'fr_FR.utf8',
+			territory: 'France'
+		}
 	],
 	layouts: [
-		{name: 'us', short_description: 'en', description: 'English (US)'},
-		{name: 'at', short_description: 'de', description: 'German (Austria)'},
-		{name: 'us rus', short_description: 'ru', description: 'Russian (US, phonetic)'}
+		{
+			name: 'us',
+			short_description: 'en',
+			description: 'English (US)'
+		},
+		{
+			name: 'at',
+			short_description: 'de',
+			description: 'German (Austria)'
+		},
+		{
+			name: 'us rus',
+			short_description: 'ru',
+			description: 'Russian (US, phonetic)'
+		}
 	],
 	sessions: [
-		{key: 'gnome', name: 'GNOME', comment: 'This session logs you into GNOME'},
-		{key: 'cinnamon', name: 'Cinnamon', comment: 'This session logs you into Cinnamon'},
-		{key: 'plasma', name: 'Plasma', comment: 'Plasma by KDE'},
-		{key: 'mate', name: 'MATE', comment: 'This session logs you into MATE'},
-		{key: 'openbox', name: 'Openbox', comment: 'This session logs you into Openbox'}
+		{
+			key: 'gnome',
+			name: 'GNOME',
+			comment: 'This session logs you into GNOME'
+		},
+		{
+			key: 'cinnamon',
+			name: 'Cinnamon',
+			comment: 'This session logs you into Cinnamon'
+		},
+		{
+			key: 'plasma',
+			name: 'Plasma',
+			comment: 'Plasma by KDE'
+		},
+		{
+			key: 'mate',
+			name: 'MATE',
+			comment: 'This session logs you into MATE'
+		},
+		{
+			key: 'openbox',
+			name: 'Openbox',
+			comment: 'This session logs you into Openbox'
+		}
 	],
 	users: [
 		{