*/
private VerifierFromDescr flatten(FromDescr descr, VerifierComponent parent)
throws UnknownDescriptionException {
VerifierFromDescr from = new VerifierFromDescr();
VerifierComponent ds = flatten(descr.getDataSource(), from);
from.setDataSourceId(ds.getId());
from.setDataSourceType(ds.getComponentType());
from.setParent(parent);
return from;
}