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1   /*
2    * Copyright (C) 2016 The Guava Authors
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package com.google.common.collect;
18  
19  import com.google.common.annotations.GwtCompatible;
20  import java.io.Serializable;
21  
22  /**
23   * A dummy superclass to support GWT serialization of the element type of a {@link Range}. The GWT
24   * supersource for this class contains a field of type {@code C}.
25   *
26   * <p>For details about this hack, see {@link GwtSerializationDependencies}, which takes the same
27   * approach but with a subclass rather than a superclass.
28   *
29   * <p>TODO(cpovirk): Consider applying this subclass approach to our other types.
30   */
31  @GwtCompatible(emulated = true)
32  abstract class RangeGwtSerializationDependencies<C extends Comparable> implements Serializable {}