biddingScheme.setSpendTarget(new Money(null, 20000000L));
sharedBiddingStrategy.setBiddingScheme(biddingScheme);
// Create operation.
BiddingStrategyOperation operation = new BiddingStrategyOperation();
operation.setOperand(sharedBiddingStrategy);
operation.setOperator(Operator.ADD);
BiddingStrategyOperation[] operations = new BiddingStrategyOperation[] {operation};
BiddingStrategyReturnValue result = biddingStrategyService.mutate(operations);
SharedBiddingStrategy newBiddingStrategy = result.getValue(0);