internal static NpoiExcelCellValueHolder CreateFrom(CellValue cellValue) { cellValue.ThrowIfNull(nameof(cellValue)); return(cellValue.CellType switch { CellType.String => new NpoiExcelCellValueHolder(cellValue.StringValue, isFormula: false), CellType.Numeric => new NpoiExcelCellValueHolder(cellValue.NumberValue), CellType.Boolean => new NpoiExcelCellValueHolder(cellValue.BooleanValue), CellType.Error => new NpoiExcelCellValueHolder(cellValue.ErrorValue), CellType.Formula => new NpoiExcelCellValueHolder(cellValue.StringValue, isFormula: true), _ => throw new ArgumentOutOfRangeException( nameof(cellValue), cellValue.CellType, $"Unknown cell type: '{cellValue.CellType.ToString()}'." ) });