NewRetry initializes a retry handler maxRetry is *retries*, so maxRetry of 2 means 3 total tries.

NewRetryWithMaxWaitTime initializes a retry handler maxRetry is *retries*, so maxRetry of 2 means 3 total tries.

NewTestRetry is the test version, returns Retry in test mode (nanosecond retry delay).

WaitTime calculates the wait time based off the attempt number based off exponential backoff with a random delay.

15 minutes.

NonRetryableError represents an error returned if the error should not be retried.

Retry handles executing and retrying a function It uses exponential backoff between retry attempts.