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.observers;


An interface that indicates that the implementing type is composed of individual components and exposes information
about their behavior.

NOTE: This is considered a read-only public API and is not intended to be implemented externally.

History: 2.1.4 - experimental

Since:2.2
/**
 * An interface that indicates that the implementing type is composed of individual components and exposes information
 * about their behavior.
 *
 * <p><em>NOTE:</em> This is considered a read-only public API and is not intended to be implemented externally.
 * <p>History: 2.1.4 - experimental
 * @since 2.2
 */
public interface LambdaConsumerIntrospection {

    
Returns true or false if a custom onError consumer has been provided.

Returns:true if a custom onError consumer implementation was supplied. Returns false if the implementation is missing an error consumer and thus using a throwing default implementation.
/**
     * Returns true or false if a custom onError consumer has been provided.
     * @return {@code true} if a custom onError consumer implementation was supplied. Returns {@code false} if the
     * implementation is missing an error consumer and thus using a throwing default implementation.
     */
    boolean hasCustomOnError();

}