Missing CsvHelper in Localization package

Hello,

I´m trying to follow this code example for customizing CSV export/import in Localization package https://docs.unity3d.com/Packages/com.unity.localization@1.0/api/UnityEditor.Localization.Plugins.CSV.Columns.CsvColumns.html

Unfortunately, I found out that the namespace CsvHelper used in CsvColumns class does not exist. For that reason, there are no classes such as CsvWriter and CsvReader.

I do have the current version of the package: 1.0.5

Is there anybody who had the same issue, or it´s me doing something wrong?