Benjamin Trent 8f302282f4
[ML] adds new feature_processors field for data frame analytics (#60528) (#61148)
feature_processors allow users to create custom features from
individual document fields.

These `feature_processors` are the same object as the trained model's pre_processors.

They are passed to the native process and the native process then appends them to the
pre_processor array in the inference model.

closes https://github.com/elastic/elasticsearch/issues/59327
2020-08-14 10:32:20 -04:00
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