SharedModel+Encoding.swift

extension SharedModel {

  class func decode(data: Data) -> SharedModel? {
    NSKeyedUnarchiver.setClass(SharedModel.self, forClassName: "SharedModel")
    return NSKeyedUnarchiver.unarchiveObject(with: data) as? SharedModel
  }

  func encode() -> Data {
    NSKeyedArchiver.setClassName("SharedModel", for: SharedModel.self)
    return NSKeyedArchiver.archivedData(withRootObject: self)
  }
  
}