Write a program that processes batch requests for updating simple databases. (Imagine that commands have been saved during the day for an overnight run that actually updates the databases.) The databases can be simulated using a map data structure, using strings for both keys and values. Here is the Database class interface in C++ class Database map data; public: Database (const string& id) string getID) const; void add (const string& key., const string& value) const const string& value) string get (const string& key) void update (const string&key, void remove (const string& key) void display (ostream& dest) const; // Writes keylvalue lines (Note: the above interface may be modified if necessary And you don’t have to use a map. It’s just easiest.) Each database has a string id that identifies it.