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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      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.android.launcher3.util;
     18 
     19 import java.lang.annotation.ElementType;
     20 import java.lang.annotation.Retention;
     21 import java.lang.annotation.RetentionPolicy;
     22 import java.lang.annotation.Target;
     23 
     24 /**
     25  * Indicates that the given field or method has package visibility solely to prevent the creation
     26  * of a synthetic method. In practice, you should treat this field/method as if it were private.
     27  * <p>
     28  *
     29  * When a private method is called from an inner class, the Java compiler generates a simple
     30  * package private shim method that the class generated from the inner class can call. This results
     31  * in unnecessary bloat and runtime method call overhead. It also gets us closer to the dex method
     32  * count limit.
     33  * <p>
     34  *
     35  * If you'd like to see warnings for these synthetic methods in eclipse, turn on:
     36  * Window > Preferences > Java > Compiler > Errors/Warnings > "Access to a non-accessible member
     37  * of an enclosing type".
     38  * <p>
     39  *
     40  */
     41 @Retention(RetentionPolicy.SOURCE)
     42 @Target({ElementType.METHOD, ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.TYPE})
     43 public @interface Thunk { }