This is internal pointer helper for scene evaluation and tools, though exposed to bpy API, it can give false 'dependency cycles' in bpy.data.user_map() results. That's followup to rBe007552442634 really, both should be backported to 2.78
This is internal pointer helper for scene evaluation and tools, though exposed to bpy API, it can give false 'dependency cycles' in bpy.data.user_map() results. That's followup to rBe007552442634 really, both should be backported to 2.78