public Long call(int callTimeout) throws IOException {
PayloadCarryingRpcController controller = rpcControllerFactory.newController();
controller.setPriority(getTableName());
controller.setCallTimeout(callTimeout);
try {
MutateRequest request = RequestConverter.buildIncrementRequest(
getLocation().getRegionInfo().getRegionName(), row, family,
qualifier, amount, durability, nonceGroup, nonce);
MutateResponse response = getStub().mutate(controller, request);
Result result =
ProtobufUtil.toResult(response.getResult(), controller.cellScanner());