OptionalerrorOptionalerrorPrefix of thrown errors' name (see FoundationApiError); defaults to 'Foundation'.
OptionalfetchInjectable fetch, for tests and non-browser hosts.
OptionalgetSupplies the Bearer token per request; omit for anonymous servers.
Name used in the fallback "{errorLabel} request failed (HTTP …) at …" message when a non-2xx response carries no server-supplied detail. Defaults to 'OpenCDE'; a concrete client (BCF, Documents, ...) names itself so the message reads like the rest of that client's errors.