/**
 *
 * @param {string} start
 * @param {string} end
 * @param {number} step
 * @returns {Array<string>}
 * @internal
 */
export declare function rangeString(start: string, end: string, step?: number): Array<string>;
/**
 * @param {number} start
 * @param {number} end
 * @param {number} step
 * @returns {Array<number>}
 * @internal
 */
export declare function rangeNumber(start: number, end: number, step?: number): Array<number>;