import type { QueryClient } from '@tanstack/react-query';
import type { ThreadEvent, ThreadOverview } from '@pantheon-systems/css-client';
/**
 * Writes one thread's latest overview into its page's loaded listing.
 *
 * This is the seam every source of change comes through: a comment this reader just
 * posted, and later a change pushed from another reader. A page whose listing has not
 * been loaded is left alone, since writing one thread into an empty map would stand in
 * for a listing that was never fetched.
 *
 * @returns Whether a loaded listing was there to update.
 */
export declare function applyThreadOverview(queryClient: QueryClient, thread: ThreadOverview): boolean;
/**
 * Folds a change to a thread into the page listing it belongs to, and a new or
 * rewritten comment into its thread as well when that thread is open.
 *
 * @returns Whether anything loaded was there to update.
 */
export declare function applyThreadEvent(queryClient: QueryClient, event: ThreadEvent): boolean;