#include <iostream>
#include <string>
#include <vector>
#include <fbb/foreach.h>

template <typename Type>
class Vector2: public std::vector<std::vector<Type> >
{
    template <typename Iterator, typename Class, typename Data>
    friend Class &FBB::ForEach(Iterator begin, Iterator end, Class *object,
                void (Class::*member)(Data &));

    public:
        void process()
        {
            FBB::ForEach(begin(), end(), this, &Vector2<Type>::rows);
        }

    private:
        void rows(std::vector<Type> &row)
        {
            FBB::ForEach(row.begin(), row.end(), this,
                                                &Vector2<Type>::columns);
            std::cout << '\n';
        }
        void columns(Type &str)
        {
            std::cout << str << " ";
        }
};

using namespace std;

int main()
{
    Vector2<string> c;
    c.push_back(vector<string>(3, "Hello"));
    c.push_back(vector<string>(2, "World"));

    c.process();
}