#ifndef DATASTORE_H
#define DATASTORE_H

// DataStore.h - Stub for DataStore class (doesn't meet requirements)

#include <vector>
#include <string>

class DataStore
{
public:
  using iterator = std::vector<std::string>::iterator;

  void save(const std::string& filespec) { store.push_back(filespec); }
  void save(const std::string& filename, const std::string& path) {}
  iterator begin() { return store.begin(); }
  iterator end() { return store.end(); }
  // you may want friendier access to DataStore contents
private:
  std::vector<std::string> store;  // you need more than this
};
#endif