/* get all individuals (direct and indirect) of class cc only if the class is defined in the ontology */
if (reasoner.isDefined(cc)){
timers.createTimer("retrieval");
Timer timerRetrieval = timers.startTimer( "retrieval" );
individuals = reasoner.getIndividuals(cc, false);
timerRetrieval.stop();
/* get direct individuals only */
directIndividuals = reasoner.getIndividuals(cc, true);
/* update instance retrieval time */