BuilderPattern for creating multiple type of objects

BuilderPatternWithOptionals.swift

class OptionDetailData: Equatable {
    var isExpired: Bool = false
    var expiryDate: String?
    var cardNumber: String?
    var formattedNumber: String?
    var phoneNumber: String?
    
    static func == (lhs: OptionDetailData, rhs: OptionDetailData) -> Bool {
        return true
    }
  
  class Builder {
    
    private var detailData: OptionDetailData = OptionDetailData()
    
    func set(isExpired: Bool) -> Builder {
        detailData.isExpired = isExpired
        return self
    }
    
    func set(expiryDate: String) -> Builder {
        detailData.expiryDate = expiryDate
        return self
    }
    
    func set(cardNumber: String) -> Builder {
        detailData.cardNumber = cardNumber
        return self
    }
    
    func set(formattedNumber: String) -> Builder {
        detailData.formattedNumber = formattedNumber
        return self
    }
    
    func set(phoneNumber: String) -> Builder {
        detailData.phoneNumber = phoneNumber
        return self
    }
    
    func build() -> OptionDetailData {
        return detailData
    }
}
}

let data = OptionDetailData.Builder()
    .set(isExpired: false)
    .set(expiryDate: "Today")
    .set(formattedNumber: "****1234****")
    .set(phoneNumber: "9876543210")
    .set(cardNumber: "441122224411")
    .build()
print(data)

let walletMetadata = OptionDetailData.Builder()
    .set(phoneNumber: "9876543210")
    .build()
print(walletMetadata.phoneNumber)