var vmEntity = System.getModule("com.vmware.library.vcac").getVirtualMachineEntity(host,virtualMachine);
var requestId = getVmEntityPropertyValue(host, vmEntity, "__Cafe.Root.Request.Id");
return requestId;

function getVmEntityPropertyValue(host, vmEntity, propertyName) {
	var virtualMachinePropertiesEntities = vmEntity.getLink(host, "VirtualMachineProperties");
	for each (var virtualMachinePropertiesEntity in virtualMachinePropertiesEntities) {
		if (virtualMachinePropertiesEntity.getProperty("PropertyName") == propertyName) {
			return virtualMachinePropertiesEntity.getProperty("PropertyValue");
		}
	}
	return null;
}