Interface to indicate the implementor class wraps a Runnable that can be accessed via getWrappedRunnable().

You can check if a Runnable task submitted to a Scheduler (or its Scheduler.Worker) implements this interface and unwrap the original Runnable instance. This could help to avoid hooking the same underlying Runnable task in a custom RxJavaPlugins#onSchedule(Runnable) hook set via the RxJavaPlugins#setScheduleHandler(Function) method multiple times due to internal delegation of the default Scheduler.scheduleDirect or Scheduler.Worker.schedule methods.

History: 2.1.7 - experimental