[7.x] [ML] adds multi-class feature importance support (#53803)#54024

Merged

benwtrent merged 1 commit intoelastic:7.xfrom benwtrent:backport/7.x/pr-53803

Mar 23, 2020

+410-138

Commits on Mar 23, 2020

[ML] adds multi-class feature importance support (elastic#53803 )
benwtrent
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