def used_vacation(self, date_string: Optional[str] = None) -> int:
used_vacation = 0
for month in self.months:
used_vacation += month.used_vacation(date_string=date_string)
return used_vacation
def used_vacation(self) -> int:
used_vacation = 0
for month in self.months:
used_vacation += month.used_vacation()
return used_vacation
def used_vacation(self, date_string: Optional[str] = None) -> int:
used_vacation = 0
for month in self.months:
used_vacation += month.used_vacation(date_string=date_string)
return used_vacation
def used_vacation(self) -> int:
used_vacation = 0
for month in self.months:
used_vacation += month.used_vacation()
return used_vacation
