protected Observable<ByteBuf> updateRecommendations() {
        return Observable.concat(Observable.from(triggerRecommendationsUpdate()));
    }
Base class for the transport/template and proxy examples. It orchestrates application flow, and
handles result(s) from the server. The request execution is implemented in the derived classes, in a way
specific for each API abstration. This separation of concerns makes it is easy to compare complexity of different APIs.

@author Tomasz Bak
ribbon-examples/src/main/java/com/netflix/ribbon/examples/rx/AbstractRxMovieClient.java