import type { HotInstance } from '../../core/types';
/**
 * Calculates the total height of the merged cell.
 *
 * @param {Core} hotInstance The Handsontable instance.
 * @param {*} row The merged cell's row index.
 * @param {*} rowspan The merged cell height.
 * @returns {number}
 */
export declare function sumCellsHeights(hotInstance: HotInstance, row: number, rowspan: number): number;