Optical Controller component:

                if len(existing_ob) > 0:

                    #first checking if provided band id is passed

                    if preferred is not None:

                    if preferred is not None and preferred != "ANY":

                        ob_id = int(preferred)

                        if "is_active" in self.optical_bands[ob_id].keys():

                            is_active = self.optical_bands[ob_id]["is_active"]