code: @Override
      public OntModel getGraph(URI graphUri) {
          log.debug("Obtaining graph: {}", graphUri.toASCIIString());
  
          if (graphUri == null)
              return null;
  
          // FIXME: For now Jena and Sesame can't talk to each other
          // Jena will ignore a named graph as the output.
          // Use HTTP protocol if possible
  //        if (this.sparqlServiceEndpoint != null) {
  //            Model model = datasetAccessor.getModel(graphUri);
  //            return ModelFactory.createOntologyModel(this.modelSpec, model);
  //
  //        } else {
          return this.getGraphSparqlQuery(graphUri);
  //        }
      }
docs: Get a named model of a Dataset
  
  @param graphUri
  @return the Ontology Model