import * as React from 'react';
import type { IFocusTrapZoneProps } from './FocusTrapZone.types';
export declare const FocusTrapZone: React.FunctionComponent<IFocusTrapZoneProps> & {
    /**
     * Stack of active FocusTrapZone identifiers, exposed for testing purposes only.
     * (This is always set, just marked as optional to avoid a cast in the component definition.)
     * @internal
     */
    focusStack?: string[];
};