/**
 * @license
 * Copyright 厦门乾元盛世科技有限公司 All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file.
 */
import { ElementRef, Renderer } from '@angular/core';
import { QueryList } from '@angular/core';
import { Option } from './option';
export declare class OptionGroup {
    private renderer;
    private elementRef;
    isSelectOptGroup: boolean;
    /** 菜单样式前缀 */
    prefixCls: string;
    /** Label */
    label: string;
    disabled: boolean;
    _options: QueryList<Option>;
    options: Option[];
    constructor(renderer: Renderer, elementRef: ElementRef);
    /**
     * 菜单样式
     */
    readonly classes: string;
    readonly titleClass: string;
    readonly listClass: string;
    getOptions(): Option[];
    pushOption(option: Option): void;
}