public IterableWithMarker<AlarmHistoryItem> expected() {
Set<AlarmHistoryItem> alarmHistoryItems = Sets.newLinkedHashSet();
for (int i = 1; i <= 2; i++) {
alarmHistoryItems.add(new AlarmHistoryItem(
"TestAlarmName" + i,
"{\"reason\": \"" + i + "\"}",
i == 1 ?
HistoryItemType.ACTION :
HistoryItemType.CONFIGURATION_UPDATE,