presto-elasticsearch/src/main/java/io/prestosql/elasticsearch/client/ElasticsearchClient.java/ElasticsearchClient/clearScroll
class ElasticsearchClient:    public void clearScroll(String scrollId)
    {
        ClearScrollRequest request = new ClearScrollRequest();
        request.addScrollId(scrollId);
        try {
            client.clearScroll(request);
        }
        catch (IOException e) {
            throw new PrestoException(ELASTICSEARCH_CONNECTION_ERROR, e);
        }
    }