Bake IK Animation into FK Animation.
- Enable ModifierAnimationBaker plugin
 - Select one AnimationPlayer on SceneTreeDock
 - Run ModifierAnimationBaker in 
Project > Tools > Modifier Animation Baker... - Select target AnimationMixer and AnimationLibrary on the dialog
 - Set other options and accept dialog
 
Target animation mixer must have RESET animation to make a list of baking bones, also must have editable (not imported) AnimationLibrary.
