code: public Ontology getOntology(String iri) {
      org.molgenis.ontology.core.meta.Ontology ontology =
          dataService
              .query(ONTOLOGY, org.molgenis.ontology.core.meta.Ontology.class)
              .eq(ONTOLOGY_IRI, iri)
              .findOne();
      return toOntology(ontology);
    }
docs: Retrieves an ontology with a specific IRI.
  
  @param iri the IRI of the ontology