In reply to dave_59:
thank you for your feedback Dave,
I read your paper but still it is not clear for me how to implement the solution.
I read in your paper the following : “you can use either the virtual interface
or abstract class mechanisms to reference the interface.” while in the example provided you used both abstract class and an interface.
also would you please explain to me :what do you mean by concrete class definition ?
I am not sure I understood what is the probe class you created for.
Thanks