See: Description
| Interface | Description | 
|---|---|
| CorePublisher<T> | A  CoreSubscriberaware publisher. | 
| CoreSubscriber<T> | A  Contextaware subscriber which has relaxed rules for §1.3 and §3.9
 compared to the originalSubscriberfrom Reactive Streams. | 
| Disposable | Indicates that a task or resource can be cancelled/disposed. | 
| Disposable.Composite | A container of  Disposablethat is itselfDisposable. | 
| Disposable.Swap | A  Disposablecontainer that allows updating/replacing its inner Disposable
 atomically and with respect of disposing the container itself. | 
| Fuseable | A micro API for stream fusion, in particular marks producers that support a  Fuseable.QueueSubscription. | 
| Fuseable.ConditionalSubscriber<T> | A subscriber variant that can immediately tell if it consumed
 the value or not, directly allowing a new value to be sent if
 it didn't. | 
| Fuseable.QueueSubscription<T> | Support contract for queue-fusion based optimizations on subscriptions. | 
| Fuseable.ScalarCallable<T> | Marker interface indicating that the target can return a value or null,
 otherwise fail immediately and thus a viable target for assembly-time
 optimizations. | 
| Fuseable.SynchronousSubscription<T> | Base class for synchronous sources which have fixed size and can
 emit their items in a pull fashion, thus avoiding the request-accounting
 overhead in many cases. | 
| Scannable | A Scannable component exposes state in a non strictly memory consistent way and
 results should be understood as best-effort hint of the underlying state. | 
| Class | Description | 
|---|---|
| Disposables | A support class that offers factory methods for implementations of the specialized
  Disposablesub-interfaces (Disposable.Composite,Disposable.Swap). | 
| Exceptions | Global Reactor Core Exception handling and utils to operate on. | 
| Scannable.Attr<T> | Base class for  Scannableattributes, which all can define a meaningful
 default. | 
| Enum | Description | 
|---|---|
| Scannable.Attr.RunStyle | An  Enumenumerating the different styles an operator can run : theirEnum.ordinal()reflects the level of confidence
 in their running mode |