public override void Execute()
{
Console.WriteLine("\nExecute!\n");
ConstraintSolver solver = ConstraintSolver.Instance();
// This is done just to show the current state.
solver.Solve();
// Create a memento
// Acting as caretaker by storing it here
_state = solver.CreateMemento();
// Move graphic
_target.Move(_delta);
// Adjust constraints for movement
solver.ChangeState();
solver.Solve();
}
