/**
 * @module transformer
 */
/**
 * Transform number to alphabet.
 * @param number
 * @param toLowerCase
 *
 * ```ts
 * numberToAlphabet('1') === 'A'
 * numberToAlphabet(1) === 'A'
 * numberToAlphabet(27) === 'AA'
 * numberToAlphabet(675) === 'YY'
 * numberToAlphabet(703) === 'AAA'
 * ```
 */
export declare function numberToAlphabet(number: number | string, toLowerCase?: boolean): string;