https://github.com/ReactiveX/RxJava: Reactive Extensions for Java
  • David Karnok 
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.

/**
 * 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.internal.fuseable;

import io.reactivex.CompletableSource;


Interface indicating the implementor has an upstream CompletableSource-like source available via source() method. 
/**
 * Interface indicating the implementor has an upstream CompletableSource-like source available
 * via {@link #source()} method.
 */
public interface HasUpstreamCompletableSource {
    
Returns the upstream source of this Completable.

Allows discovering the chain of observables.

Returns:the source CompletableSource
/**
     * Returns the upstream source of this Completable.
     * <p>Allows discovering the chain of observables.
     * @return the source CompletableSource
     */
    CompletableSource source();
}