protected override Expression<Func<DocumentationCommentListAssociation, bool>> FindExisting(DocumentationCommentListAssociation record)
     => existing
         => existing.DocumentationCommentId == record.DocumentationCommentId
         && existing.DocumentationCommentListId == record.DocumentationCommentListId;
 protected override IEnumerable<object> EnumerateReferences(DocumentationCommentListAssociation record)
 {
     yield return record.DocumentationComment;
     yield return record.DocumentationCommentList;
 }