Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/2790
Thanks for the pull request @ddolzan and sorry for the delayed review.
To be honest, I am not sure if we should include the `ElasticSearchHelper`
in Flink. I see that might be helpful for some users, but it does not contain
any Flink related code and is in principle a light-weight Elasticsearch client.
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