class A
{
protected:
   virtual void updateValue(ID id)
    {
        m_values[i] = new AVALUE(i);
    }
private:
   map<ID, AVALUE*> m_values;
}

class B : public A
{
protected:
   virtual void doSomething(ARGS args)
   {
        m_values[args.id] = args.value;
        updateValue(args.id);
   }
private:
   map<ID, BVALUE*> m_values;
}