BackOff<T> class

BackOff is used for holding options for retrying a function.

With the default configuration functions will be retried up-to 7 times (8 attempts in total), sleeping 1st, 2nd, 3rd, ..., 7th attempt:

1. 400 ms ± 25%
2. 800 ms ± 25%
3. 1600 ms ± 25%
4. 3200 ms ± 25%
5. 6400 ms ± 25%
6. 12800 ms ± 25%
7. 25600 ms ± 25%

Usage Example:

final response = await BackOff(
  () => http.get('https://google.com').timeout(
         const Duration(seconds: 10),
      ),
  retryIf: (error, stackTrace, attempt) => error is SocketException || error is TimeoutException,
  initialDelay: const Duration(milliseconds: 200),
  maxAttempts: 8,
  percentageRandomization: 0.25,
  maxDelay: const Duration(seconds: 30),
).call();

print(response.body);