about sap provider/user interaction

[Bob]

I asked a similar question before, but it was probably not very clear, so I'm trying with a simpler one. 

I'm trying to send notifications from LteUePhy to UE RRC. 

1. Add

virtual void NotifyInSync() = 0;

virtual void NotifyOutOfSync() = 0;

to class LteUeCphySapUser.

2. Therefore, I should be able to use these two functions from LteUePhy class:

          m_ueCphySapUser->NotifyInSync();

          m_ueCphySapUser->NotifyOutOfSync();

3. Add

  void DoNotifyInSync();

  void DoNotifyOutOfSync();

to class LteUeRrc 

Are there other steps needed? So far, when I compile, NotifyInSync() and NotifyOutOfSync() are not found. 

I also don't understand why making them pure virtual functions causes concerns to the compiler, since all other functions in SapUser interface are also pure virtual. 

Thank you,