Episerver Forms 4.6.0 missing some method in DataExportingController

Hello, 

I have a custom funtion to export submit form as an excel file. It was working well untill I upgraded epi forms to version 4.6.0, then all pages on my site that using epi froms not working at all. It seem like those method were gone in DataExportingController version 4.6.0

protected virtual DataTable CreateTable(IEnumerable friendlyNames);
protected virtual DataExporterBase GetExporterFromExtension(string extension);
protected virtual string GetValidColumnName(string rawName);

And I need those methods. Does anyone know if epi they changed name or move to somewhere else?

Regards,

/Katharina