source_ property
Source is WHO asserted, from the closed set: chargeoff, dispute, case, refund, review or sample. It is the primary term of the precedence rule — an unknown source has no rank and a conflict with it could not be resolved — so it is what decides which of two disagreeing assertions is in force.
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? source_;