id property
ID is the assertion's content address, minted by the server from what was asserted. Two callers who assert the identical thing land on one ID and one row; changing any asserted field makes a different ID and a second row.
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? id;