Steps to reproduce:
- create a simple C++ application with header and source files
newClass.h
#ifndef NEWCLASS_H
#define	NEWCLASS_H

class newClass {
public:
    virtual int getVal();
protected:
    int val;
};

class MyClass: newClass{
public:
    virtual int getVal();

};

#endif	/* NEWCLASS_H */
////////////////////////////////////////////

newClass.cpp

#include "newClass.h"

int main(int argc, char** argv) {

    MyClass c;
    c.getVal();
    return 0;
}
////////////////////////////////////////////

- call code completion in newClass.cpp, it suggests to add implementation for both MyClass::getVal() and newClass::getVal() methods
- add implementation for MyClass::getVal()
- call code completion again
Result: Code completion list does not contain "newClass::getVal() - implement int" any more.