"Add Definition in MyMap.cpp" converts std::map<int,int>::key_type to std::map::key_type in definition of function

I have a header file MyMap.h with this content:

#ifndef MYMAP_H
#define MYMAP_H
#include <map>
typedef std::map<int, int> MyMap;
void AddIntToMap(const MyMap::key_type & k, const MyMap::mapped_type & v);
#endif // MYMAP_H

and an empty MyMap.cpp file:

#include "MyMap.h"

When I move my cursor after the closing brace of AddIntToMap(...), press <ALT>+<Enter> and select "Add Definition in MyMap.cpp" I get this in MyMap.cpp:

#include "MyMap.h"
void AddIntToMap(const std::map::key_type & k, const std::map::mapped_type & v)
{
    
}

I expected a definition of the AddIntToMap function that looks almost like the prototype in the header file but instead, the two parameters are typed std::map::key_type and std::map::value_type.