public static void WorksheetWrapper(IWorksheetWrapper wrapper)
{
if (wrapper is null)
{
throw new SpreadsheetNullWorksheetWrapperException();
}
}
public static WorksheetWrapper AsWorksheetWrapper(this IWorksheetWrapper instance)
{
if (instance is WorksheetWrapper result)
{
return(result);
}
throw new SpreadsheetException($"'{nameof(instance)}' is not an instance of '{typeof(WorksheetWrapper).FullName}'");
}
