Sources/ApacheBeam/Transforms/Grouping.swift

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an  AS IS BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/// Basic grouping functionality
///
public extension PCollection {
    func groupBy<K, V>(name: String? = nil, _file: String = #fileID, _line: Int = #line, _ fn: @Sendable @escaping (Of) -> (K, V)) -> PCollection<KV<K, V>> {
        map(name: name, _file: _file, _line: _line, fn)
            .groupByKey()
    }
}