Tabs Control: Prevent Dismissible
Individual Tabs can return false when a "beforeclose" event is triggered, causing that tab not to close. This test demonstrates that functionality on the very last tab in the tabset.
Main
This is just a regular tab.
Dismissible
This tab can be dismissed at all times.
Prevented Dismissible
This tab returns "false" during the tab control's "beforeclose" event, which prevents this tab from ever being closed.