title: How to hide items in JCombobox
body: <p>I have an application that uses a Swing - JCombobox.</p>
  
  <p>I prepared standard DefaultComboBoxModel and I added all items to model, but I would like hide from users some items when he wants select them from PopupMenu.</p>
  
  <p>I don't want to change the model(remove items).</p>