ErrAborted indicates that the work function provided to Do invoked the Abort callback indicating a non-retryable error.

ErrExhausted indicates that the work function provided to Do exhausted the provided attempt budget without succeeding.

ErrInvalidPolicyParam indicates that one or more Policy parameters are invalid (e.g., fall outside accepted intervals).

Backoff is a Policy implementing jittered exponential backoff.

RetryContext is passed to a WorkFn provided to a given Policy via Do, and is used to report "terminal" attempt outcomes.

Policy represents an abstract retry policy, which can be used to execute a retryable work function.

WorkFn represents the retryable work provided to a Policy for execution (i.e., passed to Do).