/**
 * Copyright 2022 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.
 */
export declare class Deferred<T> implements Promise<T> {
    #private;
    get isFinished(): boolean;
    constructor();
    then<TResult1 = T, TResult2 = never>(onFulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | null, onRejected?: ((reason: unknown) => TResult2 | PromiseLike<TResult2>) | null): Promise<TResult1 | TResult2>;
    catch<TResult = never>(onRejected?: ((reason: unknown) => TResult | PromiseLike<TResult>) | null): Promise<T | TResult>;
    resolve(value: T): void;
    reject(reason: unknown): void;
    finally(onFinally?: () => void | null): Promise<T>;
    [Symbol.toStringTag]: string;
}