import { TreeKey, TreeNode } from './types.js';
export declare function distance(x: TreeKey, y: TreeKey): TreeKey;
export declare function min(x: TreeNode<any> | null, y: TreeNode<any> | null): TreeKey;
export declare function max(x: TreeNode<any> | null, y: TreeNode<any> | null): TreeKey;
export declare function minInSubtree(node: TreeNode<any>): TreeKey;
export declare function maxInSubtree(node: TreeNode<any>): TreeKey;
