supportedLocalesOf
fun supportedLocalesOf(locales: String, options: DateTimeFormatOptions = definedExternally): ReadonlyArray<ERROR CLASS: Symbol not found for JsString>(source)
fun supportedLocalesOf(locales: ReadonlyArray<ERROR CLASS: Symbol not found for JsString>, options: DateTimeFormatOptions = definedExternally): ReadonlyArray<ERROR CLASS: Symbol not found for JsString>(source)