def members
      members = member_ids.map do |member_id|
        Member.find(member_id)
      end
      MultiAssociation.new(self, members).proxy
    end
def members
      members = member_ids.map do |member_id|
        Member.find(member_id)
      end
      MultiAssociation.new(self, members).proxy
    end
Return a list of members active in this checklist.