static void Main(string[] args)
{
var sum = NullableProtocol.Sum(null, 5);
var c = new ClassWithProtocol();
var arg = "TestString";
if (args.Length > 0 && args[0] != null)
{
arg = args[0];
}
c.Initialize(arg);
var data = c.ComputedData;
Console.WriteLine(data.ToString());
}