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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC

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/*
 * 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.internal.fuseable;

import io.reactivex.rxjava3.annotations.NonNull;
import io.reactivex.rxjava3.core.ObservableSource;

/**
 * Interface indicating the implementor has an upstream ObservableSource-like source available
 * via {@link #source()} method.
 *
 * @param  the value type
 */
public interface HasUpstreamObservableSource<@NonNull T> {
    /**
     * Returns the upstream source of this Observable.
     * Allows discovering the chain of observables.
     * @return the source ObservableSource
     */
    @NonNull
    ObservableSource source();
}