Function makeGoogleSubTitle

makeGoogleSubTitle(
v: string | null | undefined,
): string & $brand<"GoogleSubTitle">
Creates a validated GoogleSubtitle from a string or null.
Parameters
- v: string | null | undefined
  The Google Books subtitle, null, or undefined
Returns string & $brand<"GoogleSubTitle">
A branded GoogleSubtitle value
- Defined in packages/core/books/entities/book-entity.ts:159