id property
ID is the template's stable id and the path segment that fetches its body — "nda", "msa", "safe". An override keeps the built-in's id.
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;