final DefaultActionGroup group = new DefaultActionGroup();                                                                                                               
for (int i = 0; i < 30; i++) {                                                                                                                                           
	group.add(new AnAction("item " + i) {                                                                                                                                   
		public void actionPerformed(final AnActionEvent e) {}                                                                                                                  
	});                                                                                                                                                                     
}                                                                                                                                                                        
                                                                                                                                                                         
final ListPopup popup = JBPopupFactory.getInstance().createActionGroupPopup("title", group, dataContext, JBPopupFactory.ActionSelectionAid.SPEEDSEARCH, false, null, 10);
popup.showCenteredInCurrentWindow(project);