export interface PoolKeyMap<T> {
    [key: string]: T;
}
/**
 * Pool of entities.
 */
export interface Pool<T, M extends PoolKeyMap<T> = PoolKeyMap<T>> {
    /**
     * Checks if pool contains item with given key.
     *
     * @param key
     */
    has(key: keyof M | string): boolean;
    /**
     * Returns item from pool by given key.
     *
     * @param key
     */
    get<K extends keyof M | string>(key: K): K extends keyof M ? M[K] : T;
    /**
     * Adds item to pool by given key. Should throw if item with given key is already added to pool, unless
     * 'replace' argument is set to true.
     *
     * @param key
     * @param item
     * @param replace
     */
    add<K extends keyof M | string>(key: K, item: K extends keyof M ? M[K] : T, replace?: boolean): void;
    /**
     * Removes item with given key from pool.
     *
     * @param key
     */
    remove(key: keyof M | string): void;
    /**
     * Returns all keys, added to pool.
     */
    keys(): (keyof M | string)[];
    /**
     * Returns array of all items in pool.
     */
    items(): T[];
}