private static async Task <IEnumerable <LinePositionSpanTextChange> > FormattingChangesForRange(FormatRangeRequest req)
        {
            var workspace = await TestHelpers.CreateSimpleWorkspace(req.Buffer, req.FileName);

            RequestHandler <FormatRangeRequest, FormatRangeResponse> controller = new FormatRangeService(workspace, new FormattingOptions());

            return((await controller.Handle(req)).Changes);
        }
        private static async Task<IEnumerable<LinePositionSpanTextChange>> FormattingChangesForRange(FormatRangeRequest req)
        {
            var workspace = await TestHelpers.CreateSimpleWorkspace(req.Buffer, req.FileName);
            RequestHandler<FormatRangeRequest, FormatRangeResponse> controller = new FormatRangeService(workspace, new FormattingOptions());

            return (await controller.Handle(req)).Changes;
        }