import { LetterDetails, Trainee } from '../typings.js';
/**
 * 육군 훈련병에게 편지 보내기
 * @param {Trainee} trainee
 * @param {LetterDetails} letterDetails
 * @returns {void} void
 */
export declare function writeLetter(trainee: Trainee, letterDetails: LetterDetails): Promise<void>;