AK-21/Graphite-Industrial-Intelligence

1/*! *****************************************************************************2Copyright (c) Microsoft Corporation. All rights reserved.3Licensed under the Apache License, Version 2.0 (the "License"); you may not use4this file except in compliance with the License. You may obtain a copy of the5License at http://www.apache.org/licenses/LICENSE-2.06 7THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY8KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED9WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,10MERCHANTABILITY OR NON-INFRINGEMENT.11 12See the Apache Version 2.0 License for specific language governing permissions13and limitations under the License.14***************************************************************************** */15 16 17interface MapConstructor {18    /**19     * Groups members of an iterable according to the return value of the passed callback.20     * @param items An iterable.21     * @param keySelector A callback which will be invoked for each item in items.22     */23    groupBy<K, T>(24        items: Iterable<T>,25        keySelector: (item: T, index: number) => K,26    ): Map<K, T[]>;27}28