code: @Deprecated
      public static AsyncSearchQueryResult fromIndexNotFound(final String indexName) {
          //dummy default values
          SearchStatus status = new DefaultSearchStatus(1L, 1L, 0L);
          SearchMetrics metrics = new DefaultSearchMetrics(0L, 0L, 0d);
  
  
          return new DefaultAsyncSearchQueryResult(
              status,
              Observable.<SearchQueryRow>error(new IndexDoesNotExistException("Search Index \"" + indexName
                  + "\" Not Found")),
              Observable.<FacetResult>empty(),
              Observable.just(metrics)
          );
      }
docs: A utility method to return a result when the index is not found.
  
  @return an {@link AsyncSearchQueryResult} that will emit a {@link IndexDoesNotExistException} when calling
  its {@link AsyncSearchQueryResult#hits() hits()} method.
  @deprecated FTS is still in BETA so the response format is likely to change in a future version, and be
  unified with the HTTP 200 response format.