Angular upgrade

	- Upgraded Angular from 14 to 15 version.

Change-Id: I2339a04020153cbc9ed7a14bfe8e0aa265e507da
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>
diff --git a/src/app/layouts/sidebar/SidebarComponent.ts b/src/app/layouts/sidebar/SidebarComponent.ts
index c328778..60ab756 100644
--- a/src/app/layouts/sidebar/SidebarComponent.ts
+++ b/src/app/layouts/sidebar/SidebarComponent.ts
@@ -19,9 +19,9 @@
 /**
  * @file Sidebar Component
  */
-import { isNullOrUndefined } from 'util';
 import { Component, Injector, OnInit } from '@angular/core';
 import { DeviceCheckService } from 'DeviceCheckService';
+import { isNullOrUndefined } from 'SharedService';
 import { MENU_ITEMS, MENUITEMS } from 'src/models/MenuModel';
 
 /**