// a method that create a guest
public GuestDecorator CreateGuest(string name, string passportNumber, int age)
{
GuestDecorator guest = new GuestDecorator(passportNumber, age);
guest.Name = name;
return(guest);
}
// method that decorates a client as a guest
public GuestDecorator CreateClientGuest(Client client, string passportNumber, int age)
{
GuestDecorator guest = new GuestDecorator(passportNumber, age);
guest.SetComponent(client);
return(guest);
}