private static Range GetSelection(TestHelpers.Range range)
        {
            Range selection = null;
            if (!range.IsEmpty)
            {
                var start = new Point { Line = range.Start.Line, Column = range.Start.Column };
                var end = new Point { Line = range.End.Line, Column = range.End.Column };
                selection = new Range { Start = start, End = end };
            }

            return selection;
        }