Named and exported rather than written inline, because an inline union cannot
reference typeof this.productQuoteService.quote: private members are emitted
without their types, so the union degrades to unknown in the .d.ts and —
with skipLibCheck masking it at the producer — surfaces only as
result.error is of type unknown in consumers.
Errors returned by CashDepositQuoteService.create.
Named and exported rather than written inline, because an inline union cannot reference
typeof this.productQuoteService.quote: private members are emitted without their types, so the union degrades tounknownin the.d.tsand — withskipLibCheckmasking it at the producer — surfaces only asresult.error is of type unknownin consumers.