RxJava 1.x . --> List to Observable

gistfile1.txt

@Override
  public Single<FormResource> getDraft(GetDraftRequestDto getDraftRequestDto) {
    return cochesnetRepository.getDraft(getDraftRequestDto)
        .flatMapObservable(draftResponses -> Observable.from(draftResponses)
            .map(DraftResponse::mapFromCochesFieldsToPtaFields)
            .flatMap(values -> createFormResource(values, getDraftRequestDto.getToken()).toObservable())
          .switchIfEmpty(createDraft(getDraftRequestDto.getToken()).toObservable()))
        .toSingle()
        .onErrorResumeNext(this::handleError);
  }