[bind10-dev] usage of "virtual" declarations in derived classes

[zhanglikun]

> > The explicit *virtual* tells the function will be overrided, not be
hided.
> >
> > But shall we try to hide some function in base class?
> 

> This sounds like something different from what I raised...could you be
> more specific?

My meaning is: I agree to put "virtual" in a method definition if it is
defined as virtual in the parent class.

Likun