class MultiLevel_encapsulation {

    var separator = "";

    var datas:[String:String] = [:]

    func wrap() -> String{
        var out:String = ""
        var i = 0
        for (key, data) in datas{
            if i==0{
                out += key + separator + data
            }
            else{
                out += separator + key + separator + data
            }

            i+=1
        }
        return out
    }

    func unwrap(content:String){
        let split = content.components(separatedBy: separator)
        var i = 1
        while(i < split.count){
            datas[split[i-1]] = split[i]
            i += 2
        }
    }

    func getAttributesNames() -> [String]{
        var out:[String] = []
        for (key, _) in datas{
            out.append(key)
        }
        return out
    }


    func getValue(name:String) -> String? {
        return datas[name];
    }

    func setValue(name:String, value:String){
        datas[name] = value;
    }

}

class Level5_encapsulation: MultiLevel_encapsulation{
    init(message:String) {
        super.init()
        separator = "&&LEVEL5&&"
        unwrap(content:message)
    }
    override init() {
        super.init()
        separator = "&&LEVEL5&&"
    }

}

var l5message = Level5_encapsulation()
l5message.setValue(name: #anyTitle#, value: #anyValue#)
var output = l5message.wrap() // String with encapsulated message

Variable 'l5message' was never mutated; consider changing to 'let' constant