return rangeContaining(value) != null;
  }

  @Override
  @CheckForNull
  public abstract Range<C> rangeContaining(C value);

  @Override
  public boolean isEmpty() {
    return asRanges().isEmpty();
  }

  @Override
  public void add(Range<C> range) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void remove(Range<C> range) {

            Model target,
            List<? extends DependencyManagement> sources,
            ModelBuilderRequest request,
            ModelProblemCollector problems) {
        if (sources != null && !sources.isEmpty()) {
            Map<String, Dependency> dependencies = new LinkedHashMap<>();

            DependencyManagement depMgmt = target.getDependencyManagement();

            if (depMgmt != null) {

        this.values = new TreeSet<T>(comparator);
    }

    @Override
    public boolean isEmpty() {
        return values.isEmpty() && pending.isEmpty();
    }

    @Override
    public boolean constantTimeIsEmpty() {
        return values.isEmpty() && pending.isEmpty();
    }

    @Override
    public int size() {
        int pendingSize = 0;

     *
     * So {@code (b : c).plus(a) == (a : b : c)}
     */
    @CheckReturnValue
    public abstract PersistentList<T> plus(T element);

    public abstract boolean isEmpty();

    private PersistentList() {}

    private static final PersistentList<Object> NIL = new PersistentList<Object>() {
        @Override
        public void forEach(Consumer<? super Object> consumer) {
        }

        Set<Artifact> resolved = new LinkedHashSet<>();

        if (projects == null || projects.isEmpty()) {
            return resolved;
        }

        if ((scopesToCollect == null || scopesToCollect.isEmpty())
                && (scopesToResolve == null || scopesToResolve.isEmpty())) {
            return resolved;
        }

        /*

        Logic for transitive global exclusions

    @Override
    protected void merge(Metadata recessive) {
        List<Plugin> recessivePlugins = recessive.getPlugins();
        List<Plugin> plugins = metadata.getPlugins();
        if (!recessivePlugins.isEmpty() || !plugins.isEmpty()) {
            LinkedHashMap<String, Plugin> mergedPlugins = new LinkedHashMap<>();
            recessivePlugins.forEach(p -> mergedPlugins.put(p.getPrefix(), p));

    }

    /**
     * Returns true if this set contains no elements.
     *
     * @return true if this set contains no elements.
     */
    @Override
    public boolean isEmpty() {
        return map.isEmpty();
    }

    /**
     * Returns true if this set contains the specified element.
     *
     * @param o
     *            element whose presence in this set is to be tested.

    @Override
    public FileCollectionFingerprint read(Decoder decoder) throws IOException {
        Map<String, FileSystemLocationFingerprint> fingerprints = fingerprintMapSerializer.read(decoder);
        if (fingerprints.isEmpty()) {
            return FileCollectionFingerprint.EMPTY;
        }
        ImmutableMultimap<String, HashCode> rootHashes = readRootHashes(decoder);
        HashCode strategyConfigurationHash = hashCodeSerializer.read(decoder);

        }

        private boolean hasResources() {
            for (NativeResourceSet windowsResourceSet : getInputs().withType(NativeResourceSet.class)) {
                if (!windowsResourceSet.getSource().isEmpty()) {
                    return true;
                }
            }
            return false;
        }

        private boolean hasExportedSymbols() {

        }
        return fallback.getAttribute(key);
    }

    @Override
    public ImmutableAttributes asImmutable() {
        if (primary.isEmpty()) {
            return fallback.asImmutable();
        }
        if (fallback.isEmpty()) {
            return primary.asImmutable();
        }
        return attributesFactory.concat(fallback.asImmutable(), primary.asImmutable());
    }

    @Override