/*! *****************************************************************************
Copyright (c) Microsoft Corporation.
Licensed under the Apache License, Version 2.0.

See LICENSE file in the project root for details.
***************************************************************************** */
/**
 * Encapsulates a Promise and exposes its resolve and reject callbacks.
 */
export declare class Deferred<T> {
    private _promise;
    private _resolve;
    private _reject;
    private _callback?;
    /**
     * Initializes a new instance of the Deferred class.
     */
    constructor();
    /**
     * Gets the promise.
     */
    get promise(): Promise<T>;
    /**
     * Gets the callback used to resolve the promise.
     */
    get resolve(): (value?: T | PromiseLike<T> | undefined) => void;
    /**
     * Gets the callback used to reject the promise.
     */
    get reject(): (reason: any) => void;
    /**
     * Gets a NodeJS-style callback that can be used to resolve or reject the promise.
     */
    get callback(): T extends void ? (err: Error | null | undefined) => void : (err: Error | null | undefined, value: T) => void;
    /**
     * Creates a NodeJS-style callback that can be used to resolve or reject the promise with multiple values.
     */
    createCallback<A extends any[]>(selector: (...args: A) => T): (err: Error | null | undefined, ...args: A) => void;
}