protected override Expression <Func <MsBuildItemAttributeListAssociation, bool> > FindExisting(MsBuildItemAttributeListAssociation record)
 => existing
 => existing.MsBuildItemAttributeId == record.MsBuildItemAttributeId &&
 existing.MsBuildItemAttributeListId == record.MsBuildItemAttributeListId;
        protected override IEnumerable <object> EnumerateReferences(MsBuildItemAttributeListAssociation record)
        {
            yield return(record.MsBuildItemAttribute);

            yield return(record.MsBuildItemAttributeList);
        }