Iterator<? extends Map.Entry<K, ? extends VC>> currentEntries = current.entrySet().iterator();
        Iterator<? extends Map.Entry<K, ? extends VP>> previousEntries = previous.entrySet().iterator();
        Comparator<? super K> comparator = previous.comparator();

        if (currentEntries.hasNext() && previousEntries.hasNext()) {
            Map.Entry<K, ? extends VC> currentEntry = currentEntries.next();

		ipv6            bool
		activeEntries   []string
		currentEntries  []string
		expectedEntries []string
	}{
		{
			name: "normal ipset sync",
			set: &utilipset.IPSet{
				Name: "foo",
			},
			setType:         utilipset.HashIPPort,
			ipv6:            false,
			activeEntries:   []string{"172.17.0.4,tcp:80"},
			currentEntries:  nil,
			expectedEntries: []string{"172.17.0.4,tcp:80"},
		},
		{

            this.changeConsumer = changeConsumer;
            this.currentEntries = currentSnapshots.entrySet().iterator();
            this.currentSnapshots = currentSnapshots;
            this.previousEntries = previousSnapshots.entrySet().iterator();
            this.previousSnapshots = previousSnapshots;
            this.current = nextEntry(currentEntries);
            this.previous = nextEntry(previousEntries);
        }

        Map<String, FileSystemLocationFingerprint> previousFingerprints,
        Set<Entry<String, FileSystemLocationFingerprint>> currentEntries
    ) {
        ListMultimap<FileSystemLocationFingerprint, FilePathWithType> results = MultimapBuilder
            .hashKeys(previousFingerprints.size())
            .linkedListValues()
            .build();