List<String> mapList = treeMapper.getTransformation().getMapList();
treeMapper.setMapList(mapList, false);
// XXX: This should really be done in setMapList, but I'm afraid I will break
// something if I change that method.
MappingManager manager = treeMapper.getMappingManager();
treeMapper.getTransformation().setNoSourceDataUsedInMapping(manager.noSourceDataUsed());
} catch (TreeMapperException ex) {
MappingErrorHandler.IGNORE.caught(ex);
}
}