Elastic is an open-source project and we are looking forward to each
contribution.
Notice that while the [official Elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html) is rather good, it is a high-level
overview of the features of Elasticsearch. However, Elastic tries to resemble
the Java API of Elasticsearch which you can find [on GitHub](https://github.com/elastic/elasticsearch).
This explains why you might think that some options are strange or missing
in Elastic, while often they're just different. Please check the Java API first.
Having said that: Elasticsearch is moving fast and it might be very likely
that we missed some features or changes. Feel free to change that.
## Your Pull Request
To make it easy to review and understand your changes, please keep the
following things in mind before submitting your pull request: