src/vs/workbench/browser/parts/notifications/notificationsToasts.ts/NotificationsToasts/updateStyles
class NotificationsToasts:	protected override updateStyles(): void {
		this.mapNotificationToToast.forEach(({ toast }) => {
			const backgroundColor = this.getColor(NOTIFICATIONS_BACKGROUND);
			toast.style.background = backgroundColor ? backgroundColor : '';

			const widgetShadowColor = this.getColor(widgetShadow);
			toast.style.boxShadow = widgetShadowColor ? `0 0 8px 2px ${widgetShadowColor}` : '';

			const borderColor = this.getColor(NOTIFICATIONS_TOAST_BORDER);
			toast.style.border = borderColor ? `1px solid ${borderColor}` : '';
		});
	}