def METHOD_NAME(self, obj):
    depid = obj.get("metadata", {}).get("_deposit", {}).get("id")
    resolver = Resolver(pid_type='depid',
                        object_type='rec',
                        getter=lambda x: x)
    _, rec_uuid = resolver.resolve(depid)
    deposit = CAPDeposit.get_record(rec_uuid)
    if deposit.schema_is_reviewable():
        _reviews = deposit.get('_review', [])
        return ReviewSchema(many=True).dump(_reviews).data
    else:
        return None