ForDuration will retry the given function until it either returns without error, or the given duration has elapsed.

Start returns a new Retry initialized to some default values.

StartWithCtx returns a new Retry initialized to some default values.

WithMaxAttempts is a helper that runs fn N times and collects the last err.

Options provides reusable configuration of Retry objects.

Retry implements the public methods necessary to control an exponential- backoff retry loop.