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.schedulers;
  
  import io.reactivex.rxjava3.annotations.NonNull;
  import io.reactivex.rxjava3.functions.Function;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  
  /**
   * Interface to indicate the implementor class wraps a {@code Runnable} that can
   * be accessed via {@link #getWrappedRunnable()}.
   * <p>
   * You can check if a {@link Runnable} task submitted to a {@link io.reactivex.rxjava3.core.Scheduler Scheduler} (or its
   * {@link io.reactivex.rxjava3.core.Scheduler.Worker Scheduler.Worker}) implements this interface and unwrap the
   * original {@code Runnable} instance. This could help to avoid hooking the same underlying {@code Runnable}
   * task in a custom {@link RxJavaPlugins#onSchedule(Runnable)} hook set via
   * the {@link RxJavaPlugins#setScheduleHandler(Function)} method multiple times due to internal delegation
   * of the default {@code Scheduler.scheduleDirect} or {@code Scheduler.Worker.schedule} methods.
   * <p>History: 2.1.7 - experimental
   * @since 2.2
   */
  public interface SchedulerRunnableIntrospection {
  
      /**
       * Returns the wrapped action.
       *
       * @return the wrapped action. Cannot be null.
       */
      @NonNull
      Runnable getWrappedRunnable();
  }
  