closePageFinish  
  Completes a method@TabView.close_page call for @page.
If @confirm is TRUE, @page will be closed. If it's FALSE, it will be reverted to its previous state and method@TabView.close_page can be called for it again.
This function should not be called unless a custom handler for signal@TabView::close-page is used.
Parameters
page
a page of @self
confirm
whether to confirm or deny closing @page