public MobilePlanDecorator(MobilePlan mobilePlan)
 {
     _mobilePlan = mobilePlan;
 }
 public FreeCall2AnyNetwork(MobilePlan mobilePlan)
     : base(mobilePlan)
 {
     Description = "Free Call to any network for 200 munites per month";
     FreeCall2AnyNetworkPrice = 7;
 }