fullName property
FullName is the fork's "owner/repo". The owner is the account it landed in — the request's org, or the installation's own account when none was named.
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? fullName;