public OMElement retrieveDocumentSet(RetrieveBuilder builder, NonBlockCallBack callback) {
if (builder == null) return null;
if (callback == null) callback = new NonBlockCallBack();
String stirng = retrieveDocumentSet.transaction(builder, callback);
AxiomUtil axiom = AxiomUtil.getInstance();
return axiom.fromString(stirng);
}
public OMElement registryStoredQuery(QueryBuilder builder, NonBlockCallBack callback) {
if (builder == null) return null;
if (callback == null) callback = new NonBlockCallBack();
String stirng = registryStoredQuery.transaction(builder, callback);
AxiomUtil axiom = AxiomUtil.getInstance();
return axiom.fromString(stirng);
}