=item cancel
-Stub - returns false (no error) so derived classes don't need to define these
+Stub - returns false (no error) so derived classes don't need to define this
methods. Called by the cancel method of FS::cust_pkg (see L<FS::cust_pkg>).
+This method is called *before* the deletion step which actually deletes the
+services. This method should therefore only be used for "pre-deletion"
+cancellation steps, if necessary.
+
=cut
sub cancel { ''; }