Benjamin Trent 79c784932f
[ML] allow feature_names to be optional in ensemble inference model (#58059) (#58067)
This has `EnsembleInferenceModel` not parse feature_names from the XContent.

Instead, it will rely on `rewriteFeatureIndices` to be called ahead time.

Consequently, protections are made for a fail fast path if `rewriteFeatureIndices` has not been called before `infer`.
2020-06-12 16:33:54 -04:00
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