def backup_mode(backup=''):
    if backup:
        return backup
    return option('backup_mode')
Callback function to process DCNM network creation/update/deletion
dataset/ETHPy150Open saltstack/salt/salt/modules/config.py/backup_mode--crossover with--dataset/ETHPy150Open openstack/networking-cisco/networking_cisco/apps/saf/server/dfa_listen_dcnm.py/DCNMListener._cb_dcnm_msg