U++

Example:

// MyStaticClass.h
namespace A {
class MyStaticClass {
public:
    static void PrintLogToConsole(const std::string& log);
}
}

// MyStaticClass.cpp
using namespace A;

MyStaticClass::PrintLogToConsole(const std::string& log) { ... }

// Another file
#include "MyStaticClass.h" 

MyStaticClass::PrintLogToConsole("Ultimate++"); // Jumping to PrintLogToConsole doesn't work...

Will test - this is the basic re-implementation of legacy code.