public <T extends Evaluation> T  evaluate(MultiDataSetIterator iterator) {
        return evaluate(iterator, (List<String>)null);
    }
public < T extends Evaluation > T evaluate ( MultiDataSetIterator iterator ) { return evaluate ( iterator , ( List < String > ) null ) ; }
Evaluate the network (classification performance - single output ComputationGraphs only)

@param iterator Iterator to evaluate on
@return Evaluation object; results of evaluation on all examples in the data set