in example/main.dart [15:27]
void main() {
Logger.root.level = Level.ALL; // defaults to Level.INFO
Logger.root.onRecord.listen((record) {
print('${record.level.name}: ${record.time}: ${record.message}');
});
print('Fibonacci(4) is: ${fibonacci(4)}');
Logger.root.level = Level.SEVERE; // skip logs less then severe.
print('Fibonacci(5) is: ${fibonacci(5)}');
print('Fibonacci(-42) is: ${fibonacci(-42)}');
}