UnityEditor.Animations.AnimatorControllerLayer.SetOverrideMotion not working

Hello,

Lets head right to the question: does it work? does SetOverrideMotion work for anyone?

I am using mecanim and try to find the best way to make weapon switching in my game. OverrideController does not do the job well because it replaces animations instantly.

Sync layers seems like the best way to achieve what I need but they don't override blend trees. I wanted to make an editor script to handle blend tree overriding but got stuck because the method in the question isn't doing anything, even if null passed as state.

Thanks in advance to whoever knows the answer!!

Gorov