Observable zip

zip.java

        restartableFirst(RESTARTABLE_SEND_COMPLAIN_TO_API_EMAIL, () -> Observable.zip(
                AppApi.getInstance()
                        .getRestManager()
                        .sendUserComplainToAPI(name, phoneNumber, email, address, description, attachments),
                AppApi.getInstance()
                        .getRestManager()
                        .sendUserComplainToEmail(name, phoneNumber, email, address, description, title, resourceId, attachments),
                (complainResponseBaseResponse, messageBaseResponse) ->
                        new Pair<>(complainResponseBaseResponse.getData(), messageBaseResponse.getData())
                ).observeOn(AndroidSchedulers.mainThread()),
                AddComplainActivity::onComplainSentToApi,
                AddComplainActivity::onComplainSentToApiError);