docs: public Observable<ExplicitListItem> getExplicitListItemAsync(UUID appId, String versionId, UUID entityId, long itemId) {
          return getExplicitListItemWithServiceResponseAsync(appId, versionId, entityId, itemId).map(new Func1<ServiceResponse<ExplicitListItem>, ExplicitListItem>() {
              @Override
              public ExplicitListItem call(ServiceResponse<ExplicitListItem> response) {
                  return response.body();
              }
          });
      }