/** {@inheritDoc} */
 public TripleIterator findTriples(
     String queryLang, String tupleQuery, String tripleTemplate, int limit, boolean distinct)
     throws TrippiException {
   return _ri.findTriples(queryLang, tupleQuery, tripleTemplate, limit, distinct);
 }
 /** {@inheritDoc} */
 public TripleIterator findTriples(
     SubjectNode subject, PredicateNode predicate, ObjectNode object, int limit)
     throws TrippiException {
   return _ri.findTriples(subject, predicate, object, limit);
 }