If I have const and non-const versions of a function that returns a span:

class Foo {
public:
    std::span<int> myFunc() {
        auto begin{vec.begin()};
        auto end{vec.end()};
        
        // Do some work that modifies begin and end.
        
        return {begin, end};
    }

    std::span<const int> myFunc() const {
        // Same as above
    }

private:
    std::vector<int> vec{1, 2, 3};
};

Is there any way to avoid duplicating the function bodies?

I tried the const_cast approach, but got stuck on trying to cast the std::span return value.