/**
 * Copyright 2024 Google LLC. All Rights Reserved.
 *
 * 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 * as protos from '../../protos/firestore_v1_proto_api';
import api = protos.google.firestore.v1;
import { FieldPath } from '../path';
/**
 * A Query order-by field.
 *
 * @private
 * @internal
 * @class
 */
export declare class FieldOrder {
    readonly field: FieldPath;
    readonly direction: api.StructuredQuery.Direction;
    /**
     * @param field The name of a document field (member) on which to order query
     * results.
     * @param direction One of 'ASCENDING' (default) or 'DESCENDING' to
     * set the ordering direction to ascending or descending, respectively.
     */
    constructor(field: FieldPath, direction?: api.StructuredQuery.Direction);
    /**
     * Generates the proto representation for this field order.
     * @private
     * @internal
     */
    toProto(): api.StructuredQuery.IOrder;
}