MetadataTreeNode parent; // papa

    /** default # of children. Used for tree creation optimization only */
    int nChildren = 8;

    MetadataTreeNode[] children; // of cause

    public int getNChildren() {
        return nChildren;
    }

    public void setNChildren(int children) {
        nChildren = children;
    }

                }

                children.add(new ResolutionNode(a, remoteRepositories, this));
            }
            children = Collections.unmodifiableList(children);
        } else {
            children = Collections.emptyList();
        }
        trail = null;
    }

    /**

func (e *dataUsageEntry) addChild(hash dataUsageHash) {
	if _, ok := e.Children[hash.Key()]; ok {
		return
	}
	if e.Children == nil {
		e.Children = make(dataUsageHashMap, 1)
	}
	e.Children[hash.Key()] = struct{}{}
}

// Create a clone of the entry.
func (e dataUsageEntry) clone() dataUsageEntry {
	// We operate on a copy from the receiver.
	if e.Children != nil {
		ch := make(dataUsageHashMap, len(e.Children))

    }

    private static List<String> visitAll(
            Collection<Vertex> children, Map<Vertex, DfsState> stateMap, List<String> list) {
        for (Vertex v : children) {
            DfsState state = stateMap.putIfAbsent(v, DfsState.VISITING);
            if (state == null) {
                visitAll(v.children, stateMap, list);
                stateMap.put(v, DfsState.VISITED);
                list.add(v.label);

    if (announceFastAPI) {
        let children = [].slice.call(announceFastAPI.children);
        children = shuffle(children)
        let index = 0
        const announceRandom = () => {
            children.forEach((el, i) => { el.style.display = "none" });
            children[index].style.display = "block"
            index = (index + 1) % children.length
        }
        announceRandom()

     *
     * @param name the name for the new node
     * @param children the list of child nodes
     * @return a new XmlNode instance
     * @throws NullPointerException if name is null
     */
    static XmlNode newInstance(String name, List<XmlNode> children) {
        return newBuilder().name(name).children(children).build();
    }

    /**

    return new TreeTraverser<T>() {
      @Override
      public Iterable<T> children(T root) {
        return nodeToChildrenFunction.apply(root);
      }
    };
  }

  /** Returns the children of the specified node. Must not contain null. */
  public abstract Iterable<T> children(T root);

  /**

    /** Value indicating children should be merged based on element names */
    public static final String CHILDREN_COMBINATION_MERGE = "merge";
    /** Value indicating children should be appended as siblings */
    public static final String CHILDREN_COMBINATION_APPEND = "append";
    /**
     * Default mode for combining children DOMs during merge.

    }

    private static List<String> visitCycle(
            Map<String, Set<String>> graph,
            Collection<String> children,
            Map<String, DfsState> stateMap,
            LinkedList<String> cycle) {
        if (children != null) {
            for (String v : children) {
                DfsState state = stateMap.putIfAbsent(v, DfsState.VISITING);
                if (state == null) {

	parent.Children = []*Child{&child, &child1}
	DB.Save(&parent)

	var children []*Child
	DB.Where("parent_id = ?", parent.ID).Find(&children)
	if len(children) != len(parent.Children) ||
		children[0].ID != parent.Children[0].ID ||
		children[1].ID != parent.Children[1].ID {
		t.Errorf("circular reference children save not equal children:%v parent.Children:%v",
			children, parent.Children)
	}
}