Mapper.Put<T> overload method have bug, ForHeader method will never execute !!!

[Allen]

The firstRow variable does not get the object returned by the PopulateFirstRow method

private void Put<T>(ISheet sheet, IEnumerable<T> objects, bool overwrite)
{
	var sheetName = sheet.SheetName;
	var firstRow = sheet.GetRow(sheet.FirstRowNum);
	var objectArray = objects as T[] ?? objects.ToArray();
	var type = MapHelper.GetConcreteType(objectArray);

	var columns = GetTrackedColumns(sheetName, type) ??
				   GetColumns(firstRow ?? PopulateFirstRow(sheet, null, type), type);

	if (firstRow == null)
	{
		PopulateFirstRow(sheet, columns, type);
	}

	// Injects custom action for headers.
	if (overwrite && HasHeader && _headerAction != null)
	{
		firstRow?.Cells.ForEach(c => _headerAction(c));
	}

	var rowIndex = overwrite
		? HasHeader ? sheet.FirstRowNum + 1 : sheet.FirstRowNum
		: sheet.GetRow(sheet.LastRowNum) != null ? sheet.LastRowNum + 1 : sheet.LastRowNum;

	MapHelper.EnsureDefaultFormats(columns, TypeFormats);

	foreach (var o in objectArray)
	{
		var row = sheet.GetRow(rowIndex);

		if (overwrite && row != null)
		{
			sheet.RemoveRow(row);
			row = sheet.CreateRow(rowIndex);
		}

		row = row ?? sheet.CreateRow(rowIndex);

		foreach (var column in columns)
		{
			var pi = column.Attribute.Property;
			var value = pi?.GetValue(o);
			var cell = row.GetCell(column.Attribute.Index, MissingCellPolicy.CREATE_NULL_AS_BLANK);

			column.CurrentValue = value;
			if (column.Attribute.TryPut == null || column.Attribute.TryPut(column, o))
			{
				SetCell(cell, column.CurrentValue, column, setStyle: overwrite);
			}
		}

		rowIndex++;
	}

	// Remove not used rows if any.
	while (overwrite && rowIndex <= sheet.LastRowNum)
	{
		var row = sheet.GetRow(rowIndex);
		if (row != null) sheet.RemoveRow(row);
		rowIndex++;
	}
}

error:

if (firstRow == null)
{
	PopulateFirstRow(sheet, columns, type);
}

right:

if (firstRow == null)
{
	firstRow = PopulateFirstRow(sheet, columns, type);
}