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/*
 * Copyright 2017 The Error Prone Authors.
 *
 * Licensed 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 com.google.errorprone.annotations;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.CLASS;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * The method to which this annotation is applied cannot be called.
 *
 * The annotation is applied to methods that are required to satisfy the contract of an
 * interface, but that are not supported. One example is the implementation of {@link
 * java.util.Collection#add} in an immutable collection implementation.
 *
 * Marking methods annotated with {@code @DoNotCall} as {@code @Deprecated} is recommended, since
 * it provides IDE users with more immediate feedback.
 */
@Retention(CLASS)
@Target(METHOD)
public @interface DoNotCall {

  /** An optional explanation of why the method should not be called. */
  String value() default "";
}