/**
 * @license
 *-------------------------------------------------------------------------------------------
 * Copyright © 2026 Progress Software Corporation. All rights reserved.
 * Licensed under commercial license. See LICENSE.md in the package root for more information
 *-------------------------------------------------------------------------------------------
 */
import { PanelBarState } from './PanelBar.js';
import { RenderPanelBarItem } from './interfaces/RenderPanelBarItem';
import { PanelBarItemProps } from '../index.js';
import { PanelBarExpandMode } from './interfaces/PanelBarProps';
import { NavigationAction } from './interfaces/NavigationAction.js';
import * as React from 'react';
/**
 * @hidden
 */
export declare const renderChildren: ({ animation, keepItemsMounted, state, expanded, handleSelect, children, parentExpanded, level, parentPrivateKey, activeDescendantRef }: RenderPanelBarItem) => React.ReactNode;
/**
 * @hidden
 */
export declare const getFirstId: (props: any) => any;
/**
 * @hidden
 */
export declare const getInitialState: (props: any, expandMode: PanelBarExpandMode, result?: PanelBarState, parentExpanded?: boolean, parentPrivateKey?: string[]) => PanelBarState;
/**
 * @hidden
 */
export declare function flatVisibleItems(data: any, flattedItems?: any[]): any[];
/**
 * @hidden
 */
export declare function flatChildren(children: any, flattenChildren?: any[]): any[];
/**
 * @hidden
 */
export declare function flatVisibleChildren(children: any, flattenVisibleChildren?: any[]): any[];
/**
 * @hidden
 */
export declare const isPresent: (value: any) => boolean;
/**
 * Represents the PanelBarUtils functions.
 */
export declare namespace PanelBarUtils {
    /**
     * Maps a collection of PanelBarItemProps to PanelBarItem components
     * ([see example](https://www.telerik.com/kendo-react-ui/components/layout/panelbar/customization)).
     * Contained in the `PanelBarUtils` object.
     *
     * @param items - A collection of PanelBarItemProps.
     * @return {PanelBarItem[]} Returns an array of PanelBarItem components.
     */
    function mapItemsToComponents(items: Array<PanelBarItemProps>): React.ReactNode[];
}
/**
 * @hidden
 */
export declare const isArrayEqual: (firstArray: any[], secondArray: any[]) => boolean;
/**
 * @hidden
 */
export declare const getFocusedChild: (flattenChildren: any, step: number, event: any, focused?: string, action?: NavigationAction) => any;