https://github.com/elastic/elasticsearch/pull/7530 introduced support for artificial documents I submitted a PR to both es [master](https://github.com/elastic/elasticsearch/pull/8868/files) and [1.4](https://github.com/elastic/elasticsearch/pull/8869/files) branches but they are no longer reflected in the `1.5` branches. I need to update the `1.x` and `1.5` branches with these changes as well
