    public class func cardType

do {
                let cardType = try SwiftLuhn.cardType(for: cc_number_to_check!)
                switch cardType{
                case .visa:


using this code can't use cardType.

 'cardType' is inaccessible due to 'internal' protection level

i added public:

public class func cardType(for cardNumber: String, suggest: Bool = false) throws -> CardType {

and it works


