private final Map<Path, String> descriptors;

    /**
     * Whether module hierarchy was detected. If false, then package hierarchy is assumed.
     * In a package hierarchy, the {@linkplain #descriptors} map has either zero or one entry.
     * In a module hierarchy, the descriptors map may have an arbitrary number of entries,
     * including one (so the map size cannot be used as a criterion).
     *
     * @see #isModuleHierarchy()
     */

            return BIGINTEGER_ITEM;
        }

        @Override
        public boolean isNull() {
            return BigInteger.ZERO.equals(value);
        }

        @Override
        public int compareTo(Item item) {
            if (item == null) {
                return BigInteger.ZERO.equals(value) ? 0 : 1; // 1.0 == 1, 1.1 > 1
            }

            switch (item.getType()) {
                case INT_ITEM:

    private final Map<Path, String> descriptors;

    /**
     * Whether module hierarchy was detected. If false, then package hierarchy is assumed.
     * In a package hierarchy, the {@linkplain #descriptors} map has either zero or one entry.
     * In a module hierarchy, the descriptors map may have an arbitrary number of entries,
     * including one (so the map size cannot be used as a criterion).
     *
     * @see #isModuleHierarchy()
     */

    /**
     * Compares two model versions.
     *
     * @param first the first version.
     * @param second the second version.
     * @return negative if the first version is newer than the second version, zero if they are the same or positive if
     * the second version is the newer.
     */
    private static int compareModelVersions(String first, String second) {