/*******************************************************************************
 * Copyright (c) Lenovo 2020.
 *
 *  LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered
 *  pursuant a General Services Administration (GSA) contract, use, reproduction, or
 *  disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
 ******************************************************************************/
import { TreeNode } from '../../interfaces/treeNode';
/**
 * Add node levels to a tree
 * @param root
 * @param level
 */
export declare function addNodeLevels(root: TreeNode[], level: number, parentID?: string, rowIdentifier?: string): void;
/**
 *  Pre-order tree traversal visits each node using stack.
 *  Checks if leaf node based on children === null otherwise
 *  pushes all children into stack and continues traversal.
 *  hashMap object literal used for deduping.
 *
 *  Bonus: Because it traverses a tree - it also adds levels to the nodes
 *  @param root - deserialized JSON root to begin traversal
 *  @returns array  - final array of nodes in order with no dups
 */
export declare function convertMultipleRootTreeToList(roots: any[]): any[];
/**
 *  Pre-order tree traversal visits each node using stack.
 *  Checks if leaf node based on children === null otherwise
 *  pushes all children into stack and continues traversal.
 *  hashMap object literal used for deduping.
 *
 *  Bonus: Because it traverses a tree - it also adds levels to the nodes
 *  @param root - deserialized JSON root to begin traversal
 *  @returns array  - final array of nodes in order with no dups
 */
export declare function convertSingleRootTreeToList(root: any, level?: number): any[];
/**
 *  For each node visit if node not a hashMap key, insert
 *  into array.  Then append node into end of the array.
 *  @params node - object to check
 *  @param hashMap - object literal used for deduping
 *  @param array - final array that nodes are inserted
 */
export declare function visitNode(node: any, hashMap: any, array: any): void;
/**
 * Return hashmap where key is the id of the parent and value represents the array of nodes with that parent id
 * @param collection - tree collection
 * @returns
 */
export declare function groupByParentId(collection: any[]): Map<string, any[]>;