Retarget Skeleton3D BoneMap from import script

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Godot Version

4.6.stable

Question

I’m trying to make my import script more automatic, and one step I am having trouble with is retargeting my bone map into a saved bone map I have in my files.

Things I’ve tried:

accessing the bone_map through the Skeleton3D does not seem possible.

const BONEMAP : String = "res://Player/Assets/Models/bone_map.tres"

## Other import code here...

func retarget_bone_map(node : Node) -> void:
	if node is not Skeleton3D:
		for c in node.get_children():
			retarget_bone_map(c)
		return
	
	node = node as Skeleton3D
	node.retarget.bone_map = load(BONEMAP)

ERROR: Invalid access to property or key ‘retarget’ on a base object of type ‘Skeleton3D’.

Accessing the bone_map through a RetargetModifier3D does not seem possible.

const BONEMAP : String = "res://Player/Assets/Models/bone_map.tres"

## Other import code here...

func retarget_bone_map(node : Node) -> void:
	if node is not Skeleton3D:
		for c in node.get_children():
			retarget_bone_map(c)
		return
	
	node = node as Skeleton3D
	
	var retarget_mod : RetargetModifier3D
	for c in node.get_children():
		if c is RetargetModifier3D:
			retarget_mod = c as RetargetModifier3D
			break
	if retarget_mod == null:
		retarget_mod = RetargetModifier3D.new()
		retarget_mod.name = "RetargetModifier3D"
		node.add_child(retarget_mod)
		retarget_mod.owner = node.owner
	
	retarget_mod.bone_map = load(BONEMAP)

ERROR: Invalid assignment of property or key ‘bone_map’ with value of type ‘BoneMap’ on a base object of type ‘RetargetModifier3D’.