code: def next_bday(self):
          
          if self.n >= 0:
              nb_offset = 1
          else:
              nb_offset = -1
          if self._prefix.startswith('C'):
              # CustomBusinessHour
              return CustomBusinessDay(n=nb_offset,
                                       weekmask=self.weekmask,
                                       holidays=self.holidays,
                                       calendar=self.calendar)
          else:
              return BusinessDay(n=nb_offset)
docs: Used for moving to next business day.