According my previous issue #2422 Sverchok already good handle with reading and writing data to Blender objects. But what about if we have intention to work with external data in more complex way?
class ROMLYADDON_OT_add_constant_offset_array_modifier(bpy.types.Operator): bl_idname = 'romlyaddon.add_constant_offset_array_modifier' bl_label = bpy.app ...