This only applies to DC charging over SAE Combo/CCS1/Combo1, NOT AC charging over J1772. Unless you KNOW the DC charger will EASILY (w/o excessive force, possibly flexing or breaking the locking tang on the handle), it it BEST to STOP charging BEFORE attempting to unplug a vehicle that is actively DC charging.
Possible methods to STOP first:
stop button on charger (not the handle)
stop button/action in charging network's app
stop button on the car's LCD (you may want to wake the car's or stereo's power button)
See Experience with Electrify America, as to why. If you don't, you may break the locking tang on the handle and you might even cause massive arcing if charging hasn't stopped when you pulled out. Or, the broken tang can be a hazard for the next user OR, the handle might be rendered unsuable until it's repaired.