/**
 * Copyright 2023 Google LLC.
 * Copyright (c) Microsoft Corporation.
 *
 * 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.
 */
/**
 * A subclass of Map whose functionality is almost the same as its parent
 * except for the fact that DefaultMap never returns undefined. It provides a
 * default value for keys that do not exist.
 */
export declare class DefaultMap<K, V> extends Map<K, V> {
    #private;
    constructor(getDefaultValue: (key: K) => V, entries?: readonly (readonly [K, V])[] | null);
    get(key: K): V;
}