protected override Expression <Func <EnumMemberListAssociation, bool> > FindExisting(EnumMemberListAssociation record)
 => existing
 => existing.EnumMemberId == record.EnumMemberId &&
 existing.EnumMemberListId == record.EnumMemberListId;
        protected override IEnumerable <object> EnumerateReferences(EnumMemberListAssociation record)
        {
            yield return(record.EnumMember);

            yield return(record.EnumMemberList);
        }