dart exception
try {
breedMoreLlamas();
} on OutOfLlamasException { // A specific exception
buyMoreLlamas();
} on Exception catch (e) { // Anything else that is an exception
print('Unknown exception: $e');
} catch (e) { // No specified type, handles all
print('Something really unknown: $e');
} finally { // Always clean up, even if case of exception
cleanLlamaStalls();
}