private static Anchor GetAnchor(XLCell cell)
        {
            var c = cell.Comment;
            var cWidth = c.Style.Size.Width;
            var fcNumber = c.Position.Column - 1;
            var fcOffset = Convert.ToInt32(c.Position.ColumnOffset * 7.5);
            var widthFromColumns = cell.Worksheet.Column(c.Position.Column).Width - c.Position.ColumnOffset;
            var lastCell = cell.CellRight(c.Position.Column - cell.Address.ColumnNumber);
            while (widthFromColumns <= cWidth)
            {
                lastCell = lastCell.CellRight();
                widthFromColumns += lastCell.WorksheetColumn().Width;
            }

            var lcNumber = lastCell.WorksheetColumn().ColumnNumber() - 1;
            var lcOffset = Convert.ToInt32((lastCell.WorksheetColumn().Width - (widthFromColumns - cWidth)) * 7.5);

            var cHeight = c.Style.Size.Height; //c.Style.Size.Height * 72.0;
            var frNumber = c.Position.Row - 1;
            var frOffset = Convert.ToInt32(c.Position.RowOffset);
            var heightFromRows = cell.Worksheet.Row(c.Position.Row).Height - c.Position.RowOffset;
            lastCell = cell.CellBelow(c.Position.Row - cell.Address.RowNumber);
            while (heightFromRows <= cHeight)
            {
                lastCell = lastCell.CellBelow();
                heightFromRows += lastCell.WorksheetRow().Height;
            }

            var lrNumber = lastCell.WorksheetRow().RowNumber() - 1;
            var lrOffset = Convert.ToInt32(lastCell.WorksheetRow().Height - (heightFromRows - cHeight));
            return new Anchor
            {
                Text = string.Format("{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}",
                    fcNumber, fcOffset,
                    frNumber, frOffset,
                    lcNumber, lcOffset,
                    lrNumber, lrOffset
                    )
            };
        }