public static RelationshipConstraints GetTypeConstraints(string uniqueId)
        {
            var r = new RelationshipConstraints();
            var l = Instance.FindAll(x => x.RelationshipTypeId == uniqueId);

            r.AddRange(l);
            return(r);
        }
        public static RelationshipConstraints Random()
        {
            var r = new RelationshipConstraints();
            var c = GetRandom.Count();

            for (var i = 0; i < c; i++)
            {
                r.Add(RelationshipConstraint.Random());
            }
            return(r);
        }