Build an executable chain of Rx operators.
Build an executable chain of Rx operators. The resulting chain will be registered as a subscriber to the root node (see RxVar.foreach). If the root value changes, the effect code block will be executed.
a function to process the generated RxEvent. This function must return RxResult.Continue when the downstream operator can receive further events (OnNext). If the leaf sink operator issued OnError or OnCompletion event, this must return RxResult.Stop.
(Since version ) see corresponding Javadoc for more information.