@Override
      public Object call() {
        Function perfFunction = new PerfFunction();
        FunctionService.registerFunction(perfFunction);
        Function perfTxFunction = new PerfTxFunction();
        FunctionService.registerFunction(perfTxFunction);
        return Boolean.TRUE;
      }
verify that 10 orders are created for each customer
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRTransactionDUnitTest.java