type RailDispatch = (action: {
    type: 'setUi';
    ui: {
        rightSideBarVisible: boolean;
    };
}) => void;
/**
 * Lets a panel that reveals the right rail to show its own content put the rail back when it
 * closes. The rail collapses again only when that reveal is what opened it and its visibility
 * hasn't changed since; a collapse by any other route ends the lease.
 */
export declare const rightRailLease: {
    /** Expand a collapsed rail and hold the lease on it. A no-op when the rail is already visible. */
    reveal(dispatch: RailDispatch, visible: boolean): void;
    /** Collapse the rail if the lease is still held. */
    release(): void;
    /** Report the rail's current visibility; a collapsed rail is no longer the lease's to restore. */
    observe(visible: boolean): void;
    /** Drop the lease without touching the rail, e.g. when the editor that granted it unmounts. */
    end(): void;
};
export {};