scrollId = response.getScrollId();
                }
            } finally {
                SuggestUtil.deleteScrollContext(client, scrollId);
            }
            client.admin().indices().prepareRefresh(index).execute().actionGet(settings.getIndicesTimeout());
        } catch (final Exception e) {
            throw new SuggesterException("Failed to exec delete by query.", e);
        }

        return true;

    //                                                                              ======
    public RefreshResponse refresh() {
        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
    }

    // ===================================================================================

     * @throws OpenSearchAccessException if the refresh operation fails.
     */
    protected RefreshResponse refresh() {
        try {
            return getClient().get(c -> c.admin().indices().prepareRefresh(index).execute());
        } catch (final Exception e) {
            throw new OpenSearchAccessException("Failed to refresh.", e);
        }
    }

    /**

     *
     * @param indices the indices to refresh
     */
    public void refresh(final String... indices) {
        client.admin().indices().prepareRefresh(indices).execute(new ActionListener<RefreshResponse>() {
            @Override
            public void onResponse(final RefreshResponse response) {
                if (logger.isDebugEnabled()) {