Optional ReadonlyonCallback invoked before a fresh-URL upload retry.
Optional ReadonlyretryRetry settings shared with the main transport retry configuration.
Optional ReadonlyretryWhether ambiguous failures after an upload POST should be retried, including response-body read failures and transport errors where B2 may have stored the payload before the success response was lost. Defaults to false. Set true only when duplicate versions or parts are acceptable.
Shared public options for upload-layer fresh-URL retries.