How to wait for task completition

Hi,

I want to configure VM (change CPU number and memory amount) using SDK for Java.

I have following code

VirtualMachineConfigSpec vmConfigSpec = new VirtualMachineConfigSpec();
vmConfigSpec.setCpuAllocation(getShares(cpuVal));
vmConfigSpec.setMemoryAllocation(getShares(memVal));
ManagedObjectReference tmor = service.reconfigVM_Task(vmRef, vmConfigSpec);

(...)

private ResourceAllocationInfo getShares(int val) {
    ResourceAllocationInfo raInfo = new ResourceAllocationInfo();
    SharesInfo sharesInfo = new SharesInfo();
    sharesInfo.setLevel(SharesLevel.CUSTOM);
    sharesInfo.setShares(val);
    raInfo.setShares(sharesInfo);
    return raInfo;
}

I have found following example: http://communities.vmware.com/docs/DOC-10011

Example is quite good, but there is line 144:

String result = cb.getServiceUtil().waitForTask(tmor);

where cb is

private static AppUtil cb

Can someone tell me where I can find AppUtil code or how wait for reconfigVM_Task completition?