@pkerschbaum/code-oss-file-service/src/typings/thenable.d.ts

VS Code ([microsoft/vscode](https://github.com/microsoft/vscode)) includes a rich "`FileService`" and "`DiskFileSystemProvider`" abstraction built on top of Node.js core modules (`fs`, `path`) and Electron's `shell` module. This package allows to use that

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

/**
 * Thenable is a common denominator between ES6 promises, Q, jquery.Deferred, WinJS.Promise,
 * and others. This API makes no assumption about what promise library is being used which
 * enables reusing existing code without migrating to a specific promise implementation. Still,
 * we recommend the use of native promises which are available in VS Code.
 */
interface Thenable<T> {
	/**
	* Attaches callbacks for the resolution and/or rejection of the Promise.
	* @param onfulfilled The callback to execute when the Promise is resolved.
	* @param onrejected The callback to execute when the Promise is rejected.
	* @returns A Promise for the completion of which ever callback is executed.
	*/
	then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => TResult | Thenable<TResult>): Thenable<TResult>;
	then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => void): Thenable<TResult>;
}