import type { Query, QueryManager } from './types.ts';
/**
 * Simple implementation of `QueryManager` to store queries in memory.
 */
export declare class MemoryQueryManager implements QueryManager {
    private pool;
    constructor();
    /**
     * Invalidates queries by keys.
     * @param keys Keys.
     */
    invalidateQueries(keys: string[]): void;
    /**
     * Returns query instance by key.
     * @param key Key.
     * @returns Query instance.
     */
    getQuery<T>(key: string): Query<T>;
}