--- /dev/null
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. 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
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>\r
+
+
+/**\r
+ * Represents the completion of an asynchronous operation\r
+ */\r
+interface Promise<T> {\r
+ /**\r
+ * Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The\r
+ * resolved value cannot be modified from the callback.\r
+ * @param onfinally The callback to execute when the Promise is settled (fulfilled or rejected).\r
+ * @returns A Promise for the completion of the callback.\r
+ */\r
+ finally(onfinally?: (() => void) | undefined | null): Promise<T>\r
+}\r