src/vs/workbench/api/browser/mainThreadWebviewViews.ts/MainThreadWebviewsViews/$setWebviewViewBadge
class MainThreadWebviewsViews:	public $setWebviewViewBadge(handle: string, badge: IViewBadge | undefined): void {
		const webviewView = this.getWebviewView(handle);
		webviewView.badge = badge;
	}