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      1 /**
      2  * Copyright (C) 2015 Google Inc.
      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.inject.multibindings;
     18 
     19 import static java.lang.annotation.ElementType.METHOD;
     20 import static java.lang.annotation.RetentionPolicy.RUNTIME;
     21 
     22 import java.lang.annotation.Documented;
     23 import java.lang.annotation.Retention;
     24 import java.lang.annotation.Target;
     25 
     26 /**
     27  * Allows {@literal @}{@link ProvidesIntoMap} to specify a class map key.
     28  *
     29  * @since 4.0
     30  */
     31 @MapKey(unwrapValue = true)
     32 @Documented
     33 @Target(METHOD)
     34 @Retention(RUNTIME)
     35 public @interface ClassMapKey {
     36   Class<?> value();
     37 }
     38