void TestR3()
{
"Demonstrating Requirement #3".title();
Write("\n --- show orginal database ---");
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "element");
elem2.payload = "The Empire strikes back!";
dbInt.insert(2, elem2);
dbInt.showDB();
WriteLine();
Write("\n --- add a new key/value pair ---");
DBElement <int, string> elem3 = new DBElement <int, string>("Luke Skywalker", "element");
elem3.children.AddRange(new List <int> {
1, 5, 23
});
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
dbInt.insert(3, elem3);
dbInt.showDB();
WriteLine();
Write("\n --- delete key/value pair where key=1");
dbInt.delete(1);
dbInt.showDB();
WriteLine();
}