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      1 /*
      2  * Copyright (C) 2008 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.testing.features;
     18 
     19 import java.util.Set;
     20 
     21 /**
     22  * Base class for enumerating the features of an interface to be tested.
     23  *
     24  * <p>This class is GWT compatible.
     25  *
     26  * @param <T> The interface whose features are to be enumerated.
     27  * @author George van den Driessche
     28  */
     29 public interface Feature<T> {
     30   /** Returns the set of features that are implied by this feature. */
     31   Set<Feature<? super T>> getImpliedFeatures();
     32 }
     33