/**
 * @description
 * @export
 * @abstract
 * @class Affix
 */
export declare abstract class Affix {
    #private;
    /**
     * @description Define affix for the name.
     * @public
     * @static
     * @param {string} value A `string` type value.
     * @param {RegExp} [filter=Affix.filter]
     * @returns {string} The return value is a `string` type affix.
     */
    static define(value: string, filter?: RegExp): string;
    /**
     * @description
     * @public
     * @static
     * @type {RegExp}
     */
    static filter: RegExp;
    /**
     * @description Returns privately stored affix.
     * @public
     * @readonly
     * @type {string}
     */
    get get(): string;
    /**
     * Creates an instance of child class.
     * @constructor
     * @param {?string} [affix] An optional initial `string` type value as affix.
     * @param {?RegExp} [filter] The filter of `RegExp` for affix.
     */
    constructor(affix?: string, filter?: RegExp);
    /**
     * @description Sets and stores privately affix of a string type for the name.
     * @public
     * @param {string} affix A `string` type value.
     * @returns {this}
     */
    set(affix: string): this;
}