import { ReactElement, ReactNode } from 'react';
import { IndexBarIndexType } from './type';
export declare function filterValidIndexBarChild(children: ReactNode): ReactElement<any, string | ((props: any) => ReactElement<any, any> | null) | (new (props: any) => import("react").Component<any, any, any>)>[];
export declare function getFormatIndex(index: IndexBarIndexType, activeIndex: IndexBarIndexType | undefined): import("react").ReactText;
export declare function isValidIndex(index: unknown): index is IndexBarIndexType;
export declare function getGroupDomFromIndex(containerDom: HTMLDivElement, activeIndex: IndexBarIndexType): HTMLDivElement | null;