private void CreateColleagues()
 {
     PostOffice = new PostOffice();
     StNicholas = SaintNicholas.SaintNicholas.GetSaintNicholas();
     StNicholas.SetMediator(this);
     PostOffice.SetMediator(this);
 }
 public void Send(IProduct postProduct, Colleague colleague)
 {
     if (colleague == StNicholas)
     {
         PostOffice.ReceivePostProduct(postProduct);
     }
     else
     {
         StNicholas.ReceivePostProduct(postProduct);
     }
 }