Revert "XMLInvoice: lade Subklassen dynamisch"
This reverts commit cfc1ced6c2ef0b93ab52dbf6806934061c4c11af.
Revert "XMLInvoice: lade Subklassen dynamisch"
This reverts commit cfc1ced6c2ef0b93ab52dbf6806934061c4c11af.