code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * 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 io.reactivex.rxjava3.disposables;
  
  /**
   * Common interface to add and remove disposables from a container.
   * @since 2.0
   */
  public interface DisposableContainer {
  
      /**
       * Adds a disposable to this container or disposes it if the
       * container has been disposed.
       * @param d the disposable to add, not null
       * @return true if successful, false if this container has been disposed
       */
      boolean add(Disposable d);
  
      /**
       * Removes and disposes the given disposable if it is part of this
       * container.
       * @param d the disposable to remove and dispose, not null
       * @return true if the operation was successful
       */
      boolean remove(Disposable d);
  
      /**
       * Removes but does not dispose the given disposable if it is part of this
       * container.
       * @param d the disposable to remove, not null
       * @return true if the operation was successful
       */
      boolean delete(Disposable d);
  }
  