import { DBEntity, Change, CollectionChanges } from './types.js';
/**
 * Apply changes and deletions from the outbox to a primary entity
 *
 * @param primary - the entity from the primary store
 * @param hasDelete - whether the primary entity has been deleted
 * @param update - the update from the outbox
 * @returns
 */
export declare function applyOverlay(primary: DBEntity | undefined, hasDelete: boolean, update: Change | undefined): DBEntity | undefined;
export declare function overlayChangesOnCollection(entities: AsyncIterable<DBEntity>, changes: CollectionChanges | undefined): AsyncIterable<DBEntity>;