         for item in self {
             if let i = item as? SECJsonable {
                 jsonStr += "\(i.toJson())"
+            } else if let d = item as? CustomStringConvertible {
+                jsonStr += "\(d.description)"
             } else {
                 jsonStr += "\(item)"
             }

    }
}

extension Optional: SECJsonable {
    public var jsonString: String {
        switch self {
        case .None:
            return "null"

}



