sub svp_rollback { die "Virtual method!" }
+=head2 svp_generate_name
+
+Generates a name for the next savepoint. Defaults to 'savepoint_$count',
+where count is the number of current savepoints + 1.
+
+=cut
+
+sub svp_generate_name { die "Virtual method!" }
+
=for comment
=head2 txn_scope_guard