gistfile1.txt

import CoreData

class WBManagedElement: NSManagedObject {

}

class ElementParameter: NSObject, NSSecureCoding {
    private struct Keys {
        static let element = "element"

    }

    let element: WBManagedElement
    init(element: WBManagedElement) {
        self.element = element
        super.init()
    }

    @objc required init(coder aDecoder: NSCoder)  {
        element = aDecoder.decodeObjectOfClass(WBManagedElement.self, forKey: Keys.element)
        super.init()
    }

    @objc func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(element, forKey: Keys.element)
    }

    @objc class func supportsSecureCoding() -> Bool { return true }
}