public override ISet <Namespace> Call(Node node, AnalysisUnit unit, ISet <Namespace>[] args, string[] keywordArgNames)
        {
            if (args.Length == 2)
            {
                _list.AppendItem(args[1]);
            }

            return(ProjectState._noneInst.SelfSet);
        }
        public override ISet <Namespace> Call(Node node, AnalysisUnit unit, ISet <Namespace>[] args, string[] keywordArgNames)
        {
            if (args.Length == 1)
            {
                foreach (var type in args[0])
                {
                    _list.AppendItem(type.GetEnumeratorTypes(node, unit));
                }
            }

            return(ProjectState._noneInst.SelfSet);
        }