content: /*
   * 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.
   */
  package org.apache.beam.sdk.util;
  
  import org.apache.beam.sdk.annotations.Internal;
  import org.apache.beam.sdk.values.TupleTag;
  import org.apache.beam.sdk.values.WindowedValue;
  
  /**
   * Encapsulation of a method of output that can output a value with all of its windowing information
   * to a tagged destination.
   */
  @Internal
  public interface WindowedValueMultiReceiver {
    /**
     * Outputs to the given {@link TupleTag}.
     *
     * <p>Sometiems it is useful to fix a tag to produce a {@link WindowedValueReceiver}. To do so,
     * use a lambda to curry this method, as in {@code value -> receiver.output(tag, value)}.
     */
    <OutputT> void output(TupleTag<OutputT> tag, WindowedValue<OutputT> value);
  }
  