public LogisticApp(string type)
{
this.t = type switch
{
"car" => new RoadLogistics(type),
"ship" => new RoadLogistics(type),
"sea" => new SeaLogistics(),
_ => null
};
}
static void ClientMethod(Logistics creator)//
{
Console.WriteLine($"Client not concern the creator class. It still work. {creator.PlanDelivery()}");
}