import * as React from 'react';
export interface CollapseGroupProps {
    prefixCls?: string;
    className?: string;
    style?: React.CSSProperties;
    /**
     * 折叠内容
     */
    children: React.ReactNode;
    /**
     * 指定默认展开的索引
     */
    defaultOpenIndex?: number;
}
export default class CollapseGroup extends React.PureComponent<CollapseGroupProps, any> {
    static defaultProps: {
        prefixCls: string;
        style: {};
    };
    constructor(props: CollapseGroupProps);
    onToggle(isOpen: boolean, index: number): void;
    render(): JSX.Element;
}