Type Alias ProbablyString

ProbablyString: string | null | undefined

This is a type that should be a string (for e.g. validating or generating) IBANs, BBANs, bank account numbers etc. But since this library is most likely used with user input, we accept null and undefined as well to prevent type errors.

Nonetheless the functions using params of this type still will return empty results or invalid results but won't throw type errors.