def active_serialize_add *attrs, named: nil, to: nil, group: nil
      active_serialize_map attrs[0] => named if named
      return _active_serialize[:groups][group] = attrs.map(&:to_sym) if group
      _active_serialize[to || :add].concat attrs.map(&:to_sym)
    end
def active_serialize_add *attrs, named: nil, to: nil, group: nil
      active_serialize_map attrs[0] => named if named
      return _active_serialize[:groups][group] = attrs.map(&:to_sym) if group
      _active_serialize[to || :add].concat attrs.map(&:to_sym)
    end
to: `recursive` or `pluck`