-=item csv_buchungsexport
-
-Generates the CSV-Format data for the CSV DATEV export and returns
-an 2-dimensional array as an array_ref.
-
-Requires $self->fromto for a valid DATEV header.
-
-Furthermore we assume that the first day of the fiscal year is
-the first of January and we cannot guarantee that our data in kivitendo
-is locked, that means a booking cannot be modified after a defined (vat tax)
-period.
-Some validity checks (max_length and regex) will be done if the
-data structure contains them and the field is defined.
-
-To add or alter the structure of the data take a look at SL::DATEV::CSV.pm
-
-=item _csv_buchungsexport_to_file
-
-Generates one downloadable csv file wrapped in a zip archive.
-Basically this method is just a thin wrapper for TEXT::CSV_XS.pm
-
-Generates a CSV-file with the same encodings as defined in DATEV Format CSV 2015:
- $ file
- $ EXTF_Buchungsstapel.csv: ISO-8859 text, with very long lines, with CRLF line terminators
-
-Usage: _csv_buchungsexport_to_file($self, data => $self->csv_buchungsexport);
-