/**
 * @internal
 * The prefix string for ids of persistent Units, applied when saving/retrieving value to/from persistent storage,
 * This is intended to avoid conflicts with other items in the storage that do not belong to ActiveJS,
 * and to identify items in the storage that belong to ActiveJS for features like {@link clearPersistentStorage} to work as intended.
 */
export declare const KeyPrefix = "_AJS_UNIT_";
/**
 * To clear persisted values of persistent Units from storage.
 *
 * Note: It does not clear the value of Units, only the persisted value is cleared.
 *
 * See {@link https://docs.activejs.dev/guides/persistence} for more details.
 *
 * @param storage The Storage from where the Units' persisted values need to be removed. \
 * {@link Configuration.storage} is used as storage by default. \
 * You can pass a reference to whichever storage you want to clean up.
 * @category Global
 */
export declare function clearPersistentStorage(storage?: Storage): void;
/**
 * @internal please do not use.
 */
export declare function save<T>(key: string, value: T, storage?: Storage): void;
/**
 * @internal please do not use.
 */
export declare function retrieve<T>(key: string, storage?: Storage): {
    value: T;
} | null;
/**
 * @internal please do not use.
 */
export declare function remove<T>(key: string, storage?: Storage): void;