import { DocumentSnapshot, QuerySnapshot } from '../types';
/**
 * Returns true if the provided snapshots are equal.
 *
 * @param left - A snapshot to compare.
 * @param right - A snapshot to compare.
 * @returns true if the snapshots are equal.
 */
export declare const snapshotEqual: <T extends DocumentSnapshot<any> | QuerySnapshot<any>, U extends T>(left: T, right: U) => boolean;