label property
Label is the caller's own note for the link ("twitter", "newsletter"). Cosmetic: trimmed, stripped of control characters, capped at 48 bytes, and never part of the code. "primary" on the link mirrored at approval.
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? label;