/**
 * Convert row label to index.
 *
 * @param {String} label Row label (eq. '1', '5')
 * @returns {Number} Returns -1 if label is not recognized otherwise proper row index.
 */
export function rowLabelToIndex(label: string): number;
/**
 * Convert row index to label.
 *
 * @param {Number} row Row index.
 * @returns {String} Returns row label (eq. '1', '7').
 */
export function rowIndexToLabel(row: number): string;
/**
 * Convert column label to index.
 *
 * @param {String} label Column label (eq. 'ABB', 'CNQ')
 * @returns {Number} Returns -1 if label is not recognized otherwise proper column index.
 */
export function columnLabelToIndex(label: string): number;
/**
 * Convert column index to label.
 *
 * @param {Number} column Column index.
 * @returns {String} Returns column label (eq. 'ABB', 'CNQ').
 */
export function columnIndexToLabel(column: number): string;
/**
 * Extract cell coordinates.
 *
 * @param {String} label Cell coordinates (eq. 'A1', '$B6', '$N$98').
 * @returns {Array} Returns an array of objects.
 */
export function extractLabel(label: string): any[];
/**
 * Convert row and column indexes into cell label.
 *
 * @param {Object} row Object with `index` and `isAbsolute` properties.
 * @param {Object} column Object with `index` and `isAbsolute` properties.
 * @returns {String} Returns cell label.
 */
export function toLabel(row: Object, column: Object): string;