/** A persistent control outside the hidden content keeps focus while either workspace folds a panel. */
export declare function PanelToggle({ side, expanded, controls, label, className, onToggle }: {
    side: 'left' | 'right';
    expanded: boolean;
    controls: string;
    label: string;
    className: string;
    onToggle(): void;
}): import("react").JSX.Element;