return undef;
}
+sub volume_send {
+ my ($class, $scfg, $storeid, $volname, $ip, $snap,
+ $incremental_snap, $verbose, $limit, $target_path) = @_;
+
+ # implement in subclass
+ die "Volume_send is not implemented for $class";
+}
+
sub volume_rollback_is_possible {
my ($class, $scfg, $storeid, $volname, $snap) = @_;