for odoo 16

import { useService } from "@web/core/utils/hooks";

export class TstMsg extends Component {
	​setup() {this.notification = useService("notification");
	​	​   this.notification.add("Test msg", {title: "TEST", type: "danger"});
	​}
}

I can see the following error:

Uncaught Javascript Error > this. do_warn  is not a function

this.do_notify("Success", "Your Message has been send successfully...");

I can see the following error:

Uncaught Javascript Error > this.do_notify is not a function