import { User } from '../../../../../models';
/**
 * MailRecipient class
 * @class MailRecipient
 * @description Represents a recipient, which may be an email address or a username
 */
export declare class MailRecipient {
    /**
     * Creates a new Recipient instance
     * @constructor
     * @param {string} email - The email address of the recipient
     * @param {string} [username] - The username of the recipient (optional)
     */
    constructor(email: string, username?: string);
    /**
     * The email address of the recipient
     */
    email: string;
    /**
     * The username of the recipient
     */
    username: string;
    /**
     * Returns a string representation of the recipient
     * @returns {string} The string representation of the recipient
     */
    toString(): string;
    static fromUser(user: User): MailRecipient;
}