Qt Installer framework - Controlling the Uninstallation flow

Hi, Is there a way to perform some actions during the uninstallation flow based on user’s input? For example: I have to take a decision of whether to delete a directory or to retain it based on user’s input during the uninstallation. How can I prompt a user during uninstallation? How can I perform some actions in the uninstall flow? I know that, we can perform some actions during installation using addOperation, but how to do it during uninstallation? Can anyone help me with a simple script (a very basic one), which will prompt the user during uninstallation and then delete a directory if he says YES, otherwise retain it (for example: /home/username/deleteme). Thanks, -Sandeep