BetterExample.java

private Retrofit retrofit = ApplicationFactory.getRetrofitClient();
private ManagerDelegate managerDelegate = ApplicationFactory.getManagerDelegateImpl();

private Observable<Response> retrieveSomeValue(String param) {
        RetrofitClient client = retrofit.create(RetrofitClient.class);
        Observable<Response> request = client.doRequest(param);
                request.subscribe(response ->{
                    CachingManager.getInstance().cacheSimpleResponse(response);
                    //  Which one's better?
                    managerDelegate.getCachingManager.cacheSimpleResponse(response);
                });
                
          //by returning the "promise" of this network request we can allow some other component of the app to do the routing for us.
        return request;
    }