How to use the @nationalbankbelgium/stark-core.StarkErrorHandlingActionTypes.UNHANDLED_ERROR function in @nationalbankbelgium/stark-core

public starkUnhandledError$(): Observable {
		return this.actions$.pipe(
			ofType(StarkErrorHandlingActionTypes.UNHANDLED_ERROR),
			map((action: StarkUnhandledError) => {
				this.zone.run(() => {
					this.toastNotificationService
						.show({
							id: uniqueId(),
							type: StarkMessageType.ERROR,
							key: action.error.toString(),
							code: "Unhandled error - no code"
						})
						.subscribe();
				});
			})
		);
	}