def _notify_exit_thread(self, event):
        """
        Notify the termination of a thread.

        This is done automatically by the L{Debug} class, you shouldn't need
        to call it yourself.

        @type  event: L{ExitThreadEvent}
        @param event: Exit thread event.

        @rtype:  bool
        @return: C{True} to call the user-defined handle, C{False} otherwise.
        """
        dwThreadId = event.get_tid()
##        if self.has_thread(dwThreadId):   # XXX this would trigger a scan
        if self._has_thread_id(dwThreadId):
            self._del_thread(dwThreadId)
        return True
Notify the termination of a thread.

        This is done automatically by the L{Debug} class, you shouldn't need
        to call it yourself.

        @type  event: L{ExitThreadEvent}
        @param event: Exit thread event.

        @rtype:  bool
        @return: C{True} to call the user-defined handle, C{False} otherwise.