/**
 * @license
 * Copyright 2022 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { DocumentKey } from './document_key';
import { Mutation } from './mutation';
/**
 * Representation of an overlay computed by Firestore.
 *
 * Holds information about a mutation and the largest batch id in Firestore when
 * the mutation was created.
 */
export declare class Overlay {
    readonly largestBatchId: number;
    readonly mutation: Mutation;
    constructor(largestBatchId: number, mutation: Mutation);
    getKey(): DocumentKey;
    isEqual(other: Overlay | null): boolean;
    toString(): string;
}