nextRunAt property
NextRunAt is the unix time the current step comes due; 0 once the walk has ended. It IS the schedule — durable in SQLite, so it survives restarts.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? nextRunAt;