Github user justinleet commented on the issue:
https://github.com/apache/metron/pull/763
Correction to what I said earlier: the update side isn't directly actually
controlled by the `ElasticsearchMetaAlertDao` itself, it's controlled by the
`IndexDao`'s building of the document that is done in `patch` and passed to the
`update` method. The fix to `create` ensures that what the
`ElasticsearchMetaAlertDao` (which extends `IndexDao`) is consistent with the
typing that the parent class does.---
