accessed_gtfs_items.txt

feed = FeedHeader()
feed.header.gtfs_realtime_version
feed.header.timestamp
feed.header.Extensions[nyct_subway_pb2.nyct_feed_header].nyct_subway_version
feed.header.Extensions[nyct_subway_pb2.nyct_feed_header].trip_replacement_period[]
feed.header.Extensions[nyct_subway_pb2.nyct_feed_header].trip_replacement_period[i].replacement_period.end
feed.header.Extensions[nyct_subway_pb2.nyct_feed_header].trip_replacement_period[i].route_id

feed.entity[]
feed.entity[i].HasField()

feed.entity[i].trip_update
feed.entity[i].trip_update.trip
feed.entity[i].trip_update.trip.route_id
feed.entity[i].trip_update.trip.trip_id
feed.entity[i].trip_update.trip.Extensions[nyct_subway_pb2.nyct_trip_descriptor].train_id
feed.entity[i].trip_update.trip.Extensions[nyct_subway_pb2.nyct_trip_descriptor].is_assigned
feed.entity[i].trip_update.trip.start_date
feed.entity[i].trip_update.stop_time_update[]
feed.entity[i].trip_update.stop_time_update[j].stop_id
feed.entity[i].trip_update.stop_time_update[j].HasField()
feed.entity[i].trip_update.stop_time_update[j].arrival.time
feed.entity[i].trip_update.stop_time_update[j].departure.time
feed.entity[i].trip_update.stop_time_update[j].Extensions[nyct_subway_pb2.nyct_stop_time_update].HasField()
feed.entity[i].trip_update.stop_time_update[j].Extensions[nyct_subway_pb2.nyct_stop_time_update].actual_track
feed.entity[i].trip_update.stop_time_update[j].Extensions[nyct_subway_pb2.nyct_stop_time_update].scheduled_track

feed.entity[i].vehicle
feed.entity[i].vehicle.current_stop_sequence
feed.entity[i].vehicle.timestamp
feed.entity[i].vehicle.stop_id
feed.entity[i].vehicle.current_status
feed.entity[i].vehicle.trip
feed.entity[i].vehicle.trip.trip_id
feed.entity[i].vehicle.trip.Extensions[nyct_subway_pb2.nyct_trip_descriptor].train_id

feed.entity[i].alert
feed.entity[i].alert.informed_entity[]
feed.entity[i].alert.informed_entity[j].trip.Extensions[nyct_subway_pb2.nyct_trip_descriptor].train_id