update method
Implementation
Future<void> update(
AbsenceCauseEntry entry, AbsenceCauses cause, String note) async {
String target = r"s$m$Content$Content$savecancelapplyBtn$svbtn";
String url = student.buildUrl(
"fravaer_aarsag.aspx?elevid=${student.studentId}&id=${entry.id}&atype=aa");
await postLoggedInPageSoup(url, target, {
r"s$m$Content$Content$StudentReasonDD$dd": cause.name,
r"s$m$Content$Content$cancelStudentNote$tb": note
});
}