The Protobuf object to read from
The end position of the message in the buffer
OptionaldelayDelay (in seconds) can be positive (meaning that the vehicle is late) or negative (meaning that the vehicle is ahead of schedule). Delay of 0 means that the vehicle is exactly on time.
OptionaltimeEvent as absolute time. In Unix time (i.e., number of seconds since January 1st 1970 00:00:00 UTC).
OptionaluncertaintyIf uncertainty is omitted, it is interpreted as unknown. If the prediction is unknown or too uncertain, the delay (or time) field should be empty. In such case, the uncertainty field is ignored. To specify a completely certain prediction, set its uncertainty to 0.
Timing information for a single predicted event (either arrival or departure). Timing consists of delay and/or estimated time, and uncertainty.
Uncertainty applies equally to both time and delay. The uncertainty roughly specifies the expected error in true delay (but note, we don't yet define its precise statistical meaning). It's possible for the uncertainty to be 0, for example for trains that are driven under computer timing control.