This repo is only for showing a possible simple use case of passing multiple arguments from event emitter to Observable that created with fromEventPattern. The relavent issue is ReactiveX/rxjs#3048 , ReactiveX/rxjs#2431 and PR ReactiveX/rxjs#3049 .
The simple use case is about to use Oboe to consume a json-streaming server. The server returns every second only a part of a whole json object. Observable is introduced to process the data returned from the json-streaming server. But it got only the first argument while the original Oboe event passed 3 arguments in event handler.