GraphView.WInsertEdgeSpecification.WInsertEdgeSpecification C# (CSharp) Method

        public WInsertEdgeSpecification(WInsertSpecification insertSpec)
        {
            SelectInsertSource = insertSpec.InsertSource as WSelectInsertSource;
            if (SelectInsertSource == null)
            {
                throw new SyntaxErrorException("The insert source of the INSERT EDGE statement must be a SELECT statement.");
            }

            InsertOption = insertSpec.InsertOption;
            FirstTokenIndex = insertSpec.FirstTokenIndex;
            LastTokenIndex = insertSpec.LastTokenIndex;
            TopRowFilter = insertSpec.TopRowFilter;
            Target = insertSpec.Target;
            Columns = new List<WColumnReferenceExpression>();
            foreach (var col in insertSpec.Columns)
                Columns.Add(col);
        }