ticket property
Ticket is the opaque, random customer-facing reference ("tkt_" + 24 hex characters). It is NOT the ticket's internal name: that name is sequential, and handing it out would disclose the center's ticket volume.
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
String? ticket;