record shipment {
allowed-vehicles: option<list<string>>,
delivery: stop,
disallowed-vehicles: option<list<string>>,
id: string,
max-time-in-vehicle: option<s64>,
name: option<string>,
pickup: stop,
priority: option<s32>,
required-skills: option<list<string>>,
size: option<list<s32>>,
}