gistfile1.txt

class MyTabPanel extends TabPanel {
   
   @Item(1)
   private UserDetails details;

   @Item(2)
   private WebElement;

   @Item(3)
   private Calendar;

   public UserDetails getUserDetails() {
      return details;
   }
}

TabPanel extends DynamicPanel {
   // X = UserDetails
   X switchTo(X );

   @FindBy(".item")
   List<WebElement> items;

   WebElement getNthPanel(int n) {
       return items.get(n);
   }
}

UserDetails details = myTabPanel.switchTo(UserDetails.class);