[Freeswitch-users] Common Variable for CDR in Call Transfers

Hi, If you do not mind, may I know is there any way to group CDR records together? Currently, I would like to associate all CDR records made by Leg A regardless of how many time it has been transferred. Is there any common variable, tool or API to do this? Any help would be greatly appreciated. Thank you. Best Regards Chhorm Chhatra