@Test void testGetInstance() { assertNotNull(rdf, "RDF instance is null!"); }
public static RDF getInstance() { return rdf; }
RDFFactory { public static RDF getInstance() { return rdf; } }
RDFFactory { public static RDF getInstance() { return rdf; } private  RDFFactory(); }
RDFFactory { public static RDF getInstance() { return rdf; } private  RDFFactory(); static RDF getInstance(); }
RDFFactory { public static RDF getInstance() { return rdf; } private  RDFFactory(); static RDF getInstance();  }