An Observable that provides blocking operators.
A ConnectableObservable resembles an ordinary Observable, except that it does not begin emitting items when it is subscribed to, but only when its connect method is called.
EXPERIMENTAL An Observable that provides operators which delay errors when composing multiple Observables.
Contains special Observables.
In Scala, this package only contains rx.lang.scala.observables.BlockingObservable. In the corresponding Java package
rx.observables, there is also aGroupedObservableand aConnectableObservable, but these are not needed in Scala, because we use a pair(key, observable)instead ofGroupedObservableand a pair(startFunction, observable)instead ofConnectableObservable.