/**
 * A tree node.
 */
declare class TreeNode<T> {
    private _parent;
    private _children;
    /**
     * Gets or sets the node's content.
     */
    content: T;
    /**
     * Initializes a new TreeNode<T> instance.
     *
     * @param parent The node's parent.
     */
    constructor(parent?: TreeNode<T> | null);
    /**
     * Gets the node's parent.
     */
    get parent(): TreeNode<T> | null;
    /**
     * Gets the node's children.
     */
    get children(): Array<TreeNode<T>>;
    /**
     * Adds the specified node to the current node's children collection.
     *
     * @param child The node that is to be appended to the current node's children collection.
     */
    addChild(child: TreeNode<T>): void;
    /**
     * Gets a value that specifies whether the node is a root.
     */
    isRoot(): boolean;
    /**
     * Gets a value that specifies whether the node is a leaf.
     */
    isLeaf(): boolean;
}
export { TreeNode };