--- /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
+
+
+/// <reference lib="es2015.symbol" />\r
+/// <reference lib="es2015.iterable" />\r
+\r
+interface SymbolConstructor {\r
+ /**\r
+ * A method that returns the default async iterator for an object. Called by the semantics of\r
+ * the for-await-of statement.\r
+ */\r
+ readonly asyncIterator: symbol;\r
+}\r
+\r
+interface AsyncIterator<T, TReturn = any, TNext = undefined> {\r
+ // NOTE: 'next' is defined using a tuple to ensure we report the correct assignability errors in all places.\r
+ next(...args: [] | [TNext]): Promise<IteratorResult<T, TReturn>>;\r
+ return?(value?: TReturn | PromiseLike<TReturn>): Promise<IteratorResult<T, TReturn>>;\r
+ throw?(e?: any): Promise<IteratorResult<T, TReturn>>;\r
+}\r
+\r
+interface AsyncIterable<T> {\r
+ [Symbol.asyncIterator](): AsyncIterator<T>;\r
+}\r
+\r
+interface AsyncIterableIterator<T> extends AsyncIterator<T> {\r
+ [Symbol.asyncIterator](): AsyncIterableIterator<T>;\r
+}
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