import type { NavigableElement } from './Navigation.js';
export declare class TreeNode {
    id: string;
    value: NavigableElement | null;
    parent: TreeNode | null;
    children: TreeNode[];
    constructor(id: string, value?: NavigableElement | null, parent?: TreeNode | null);
    get hasChildren(): boolean;
}
export declare class Tree {
    private root;
    constructor(id: string, value?: NavigableElement | null);
    preOrderTraversal(node?: TreeNode): Generator<TreeNode, void, undefined>;
    insert(parentId: string, id: string | undefined | null, value?: NavigableElement | null): boolean;
    remove(id: string): boolean;
    find(id?: string | null): TreeNode | undefined;
}