import React from 'react';
export interface PreviewPanelOverlayProps {
    children: React.ReactNode;
    /** Whether a historical version is currently being previewed. */
    isViewingHistoricalVersion?: boolean;
    /** Version number being previewed — shown in the overlay label. */
    versionNumber?: number;
    /** Called when the user clicks "Back to current version". */
    onExitPreview?: () => void;
}
export declare function PreviewPanelOverlay({ children, isViewingHistoricalVersion, versionNumber, onExitPreview, }: PreviewPanelOverlayProps): React.ReactElement;