@Override
    public void execute(FunctionContext context) {
      if (context.getArguments() instanceof String) {
        context.getResultSender().lastResult("Failure");
      } else if (context.getArguments() instanceof Boolean) {
        context.getResultSender().lastResult(Boolean.FALSE);
      }
    }
This tests make sure that, in case of LonerDistributedSystem we dont get ClassCast Exception.
Just making sure that the function executed on lonerDistribuedSystem
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/MemberFunctionExecutionDUnitTest.java