*
     * @param zis
     *            {@link ZipInputStream}. Must not be {@literal null}.
     * @return {@link ZipEntry}
     * @see ZipInputStream#getNextEntry()
     */
    public static ZipEntry getNextEntry(final ZipInputStream zis) {
        assertArgumentNotNull("zis", zis);

        try {
            return zis.getNextEntry();
        } catch (final IOException e) {

        if (logger.isDebugEnabled()) {
            logger.debug("Theme: {}", themeName);
        }
        try (ZipInputStream zis = new ZipInputStream(Files.newInputStream(jarPath))) {
            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                if (!entry.isDirectory()) {
                    final String[] names = StreamUtil.split(entry.getName(), "/")

    ImmutableRangeMap.Builder<Integer, Integer> zis =
        ImmutableRangeMap.<Integer, Integer>builder().put(rangeOne, 1);
    ImmutableRangeMap.Builder<Integer, Integer> zat =
        ImmutableRangeMap.<Integer, Integer>builder().put(rangeTwo, 6);

    ImmutableRangeMap<Integer, Integer> rangeMap = zis.combine(zat).build();

    assertThat(rangeMap.asMapOfRanges().entrySet())