@Test
public void testcleanPath() {

  String iriStr = "http://www.semanticweb.org/sesa/ontologies/2017/3/untitled-ontology-10#Hello";
  IRI iri = IRI.create(iriStr);
  String result = UTILS.cleanPath(iri);
  assertEquals("www/semanticweb/org/sesa/ontologies/_2017/_3/untitled_ontology_10", result);
}