private final DDF_MessageVisitor<Void, MarketDo> visitor = new MapperDDF();
public static final DDF_ConsumerMarketProvider newInstance(
final SubscriptionHandler handler) {
return new DDF_ConsumerMarketProvider(new MarketFactory() {
@Override
public MarketDo newMarket(final Instrument instrument) {
return new VarMarketEntityDDF(instrument);
}