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Is it possible to access a non exported item from another translation unit?

JUANDENT (411)
I have a definition of a function called Mem() inside a C++ 20 module but not exported. I need to access Mem() from another translation unit in the project. Is it possible? I am writing some unit tests and need special access to test internal implementations...

One possibility is conditional exporting but I am looking for something better:

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#ifdef DOING_UNIT_TESTING
#define EXPORT export
#else
#define EXPORT
#endif

EXPORT void Mem() {}


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