The Protobuf object to read from
The end position of the message in the buffer
OptionalshapeThe ID of the new shape for the modified trips in this SelectedTrips. May refer to a new shape added using a GTFS-RT Shape message, or to an existing shape defined in the GTFS-Static feed's shapes.txt.
A list of trips affected with this replacement that all have the same new shape_id.
Selected trips affected by TripModifications.