Properties Library Overridable

So I have this property in my script

bpy.types.Object.ARS = BoolProperty(
name="Arm Stretch R", description="Enable/Disable Arm Stretch", default=True)

And I want to make it library overridable. But the thing is that I don’t know how.

I tried to do this

bpy.types.Object.ARS = BoolProperty(
name="Arm Stretch R", description="Enable/Disable Arm Stretch", default=True, is_overridable_library=True)

But it doesn’t work.