code: def delay(self):
          
          delay = {'departure_time': None, 'departure_delay': None, 'requested_differs': None,
                  'remarks': self.trip_remarks, 'parts': []}
          if self.departure_time_actual > self.departure_time_planned:
              delay['departure_delay'] = self.departure_time_actual - self.departure_time_planned
              delay['departure_time'] = self.departure_time_actual
          if self.requested_time != self.departure_time_actual:
              delay['requested_differs'] = self.departure_time_actual
          for part in self.trip_parts:
              if part.has_delay:
                  delay['parts'].append(part)
          return delay
docs: Return the delay of the train for this instance