if (service == null)
return new UpdateContainer(new ErrorUpdate(
"Error occured while publishing the source. The alignment tree is null."));
}
if (service != null) service.updateModel(tree);
else {
source = new DataSource(wk.getTitle(), tree);
MetadataContainer metaData = wk.getMetadataContainer();
if (metaData == null) {
metaData = new MetadataContainer();