/*
         *       v2
         *   v1<
         *       v3-v4
         *
         */
        v1 = graph.addVertex(new ArtifactMetadata("g", "a1", "1.0"));
        graph.setEntry(v1);
        v2 = graph.addVertex(new ArtifactMetadata("g", "a2", "1.0"));
        v3 = graph.addVertex(new ArtifactMetadata("g", "a3", "1.0"));
        v4 = graph.addVertex(new ArtifactMetadata("g", "a4", "1.0"));

            res.setVersionedVertices(false);
            res.setScopedVertices(false);

            MetadataGraphVertex resEntry = res.addVertex(entry.getMd());
            res.setEntry(resEntry);

            res.setScope(requestedScope);

            for (MetadataGraphVertex v : vertices) {
                final List<MetadataGraphEdge> ins = graph.getIncidentEdges(v);

         *       v2
         *   v1<
         *      v3-v4
         *
         */
        graph = new MetadataGraph(4, 3);
        v1 = graph.addVertex(new ArtifactMetadata("g", "a1", "1.0"));
        graph.setEntry(v1);
        v2 = graph.addVertex(new ArtifactMetadata("g", "a2", "1.0"));
        v3 = graph.addVertex(new ArtifactMetadata("g", "a3", "1.0"));
        v4 = graph.addVertex(new ArtifactMetadata("g", "a4", "1.0"));

        }

        return count;
    }

    // ------------------------------------------------------------------------
    public MetadataGraphVertex getEntry() {
        return entry;
    }

    public void setEntry(MetadataGraphVertex entry) {
        this.entry = entry;
    }

    public TreeSet<MetadataGraphVertex> getVertices() {
        return vertices;
    }

  }

  /**
   * Creates a fresh entry with the specified object at the specified position in the entry arrays.
   */
  void insertEntry(int entryIndex, @ParametricNullness E object, int hash, int mask) {
    setEntry(entryIndex, CompactHashing.maskCombine(hash, UNSET, mask));
    setElement(entryIndex, object);
  }

  /** Resizes the entries storage if necessary. */
  private void resizeMeMaybe(int newSize) {

  }

  /**
   * Creates a fresh entry with the specified object at the specified position in the entry arrays.
   */
  void insertEntry(int entryIndex, @ParametricNullness E object, int hash, int mask) {
    setEntry(entryIndex, CompactHashing.maskCombine(hash, UNSET, mask));
    setElement(entryIndex, object);
  }

  /** Resizes the entries storage if necessary. */
  private void resizeMeMaybe(int newSize) {

   */
  void insertEntry(
      int entryIndex, @ParametricNullness K key, @ParametricNullness V value, int hash, int mask) {
    this.setEntry(entryIndex, CompactHashing.maskCombine(hash, UNSET, mask));
    this.setKey(entryIndex, key);
    this.setValue(entryIndex, value);
  }

  /** Resizes the entries storage if necessary. */

   */
  void insertEntry(
      int entryIndex, @ParametricNullness K key, @ParametricNullness V value, int hash, int mask) {
    this.setEntry(entryIndex, CompactHashing.maskCombine(hash, UNSET, mask));
    this.setKey(entryIndex, key);
    this.setValue(entryIndex, value);
  }

  /** Resizes the entries storage if necessary. */

        list.addLast("1");
        list.addLast("2");
        list.addLast("3");
        assertThat(list.getEntry(0).getElement(), is("1"));
        assertThat(list.getEntry(1).getElement(), is("2"));
        assertThat(list.getEntry(2).getElement(), is("3"));
        try {
            list.getEntry(-1);
            fail();
        } catch (final ClIndexOutOfBoundsException ex) {
            System.out.println(ex);

     */
    public E get(final int index) {
        return getEntry(index).element;
    }

    /**
     * インデックスで指定された位置に要素を設定します。
     *
     * @param index
     *            インデックス
     * @param element
     *            要素
     * @return 元の要素
     */
    public E set(final int index, final E element) {
        final Entry entry = getEntry(index);
        final E oldValue = entry.element;