Returns a new Observable that multicasts (shares) the original Observable. As long as there is at least one Subscriber this Observable will be subscribed and emitting data. When all subscribers have unsubscribed it will unsubscribe from the source Observable. Because the Observable is multicasting it makes the stream
hot. This is an alias for
multicast(() => new Subject()), refCount().
There are no parameters.
MonoTypeOperatorFunction<T>: An Observable that upon connection causes the source Observable to emit items to its Observers.
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