[`ConnectableObservable.prototype.refCount()`](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/connectableobservable.js)

`ConnectableObservable.prototype.refCount()`

Returns an observable sequence that stays connected to the source as long as there is at least one subscription to the observable sequence.

(Observable): An observable sequence that stays connected to the source as long as there is at least one subscription to the observable sequence.