@Override
 public Boolean visitMarketDataOverride(final MarketDataOverride marketDataOverride) {
   s_logger.debug("Removing {}", marketDataOverride);
   final MarketDataInjector injector =
       getViewClient().getViewClient().getLiveDataOverrideInjector();
   if (marketDataOverride.getValueRequirement() != null) {
     injector.removeValue(marketDataOverride.getValueRequirement());
   } else {
     injector.removeValue(marketDataOverride.getIdentifier(), marketDataOverride.getValueName());
   }
   return Boolean.TRUE;
 }
 @Override
 public Boolean visitMarketDataOverride(final MarketDataOverride marketDataOverride) {
   s_logger.debug("Applying {}", marketDataOverride);
   final MarketDataInjector injector =
       getViewClient().getViewClient().getLiveDataOverrideInjector();
   Object value = marketDataOverride.getValue();
   if (marketDataOverride.getOperation() != null) {
     switch (marketDataOverride.getOperation()) {
       case ADD:
         if (value instanceof Number) {
           value = new MarketDataAddOperation(((Number) value).doubleValue());
         } else {
           throw new InvokeInvalidArgumentException(
               "Invalid ADD override - " + marketDataOverride.toString());
         }
         break;
       case MULTIPLY:
         if (value instanceof Number) {
           value = new MarketDataMultiplyOperation(((Number) value).doubleValue());
         } else {
           throw new InvokeInvalidArgumentException(
               "Invalid ADD override - " + marketDataOverride.toString());
         }
         break;
       default:
         throw new UnsupportedOperationException(marketDataOverride.getOperation().toString());
     }
   }
   if (marketDataOverride.getValueRequirement() != null) {
     injector.addValue(marketDataOverride.getValueRequirement(), value);
   } else {
     injector.addValue(
         marketDataOverride.getIdentifier(), marketDataOverride.getValueName(), value);
   }
   return Boolean.TRUE;
 }