/**
 * @license
 *-------------------------------------------------------------------------------------------
 * Copyright © 2026 Progress Software Corporation. All rights reserved.
 * Licensed under commercial license. See LICENSE.md in the package root for more information
 *-------------------------------------------------------------------------------------------
 */
/**
 * @hidden
 */
export interface DataItemWrapper {
    dataItem: any;
    rowType: any;
    level: number;
    expanded: boolean;
    dataIndex: number;
}
/**
 * @hidden
 */
export declare class RowHeightService {
    private total;
    private offsets;
    private heights;
    constructor(total: number, rowHeight: number);
    height(rowIndex: number): number;
    index(position: number): number;
    offset(rowIndex: number): number;
    totalHeight(): number;
    update(startIndex: number, rowHeights: Array<number>): void;
}