lateinit property instance has not been initialized at com.hiennv.flutter_callkit_incoming.FlutterCallkitIncomingPlugin

[redevrx]

How to create instance FlutterCallkitIncomingPlugin in native background service

 if(!FlutterCallkitIncomingPlugin.hasInstance()){
                      ///new instance callkit
                      FlutterCallkitIncomingPlugin()
                      FlutterCallkitIncomingPlugin.
                      initSharedInstance(context,engine.dartExecutor.binaryMessenger)
                  }