The Method look like that
SetFieldList(BIRTHDATE:Geburtsdatum,CARD_NUMBER:Ausweisnummer);
but "BIRTHDATE:Geburtsdatum,CARD_NUMBER:Ausweisnummer" has to be one parameter.
Use this method to create a parameter
String parameter = ValueManager.encodeMethod("SetFieldList", new String[] {"BIRTHDATE:Geburtsdatum,CARD_NUMBER:Ausweisnummer"});