Extract Function ignores namespace in cxx file

When using the Extract Function refactoring tool in C++ code, the namespace is ignored for the implementation in the cxx file.

Eg I'm extracting from Analytics::Calculation::doStuff() a fooBar() method it will be void Calculation::fooBar() instead of void Analytics::Calculation::fooBar()

The header.h looks like this

namespace Analytics {
    class Calculation : public QObject {         
        void doStuff();     
    }
};