project property
Project is the project this sandbox is bound to. A dev or desktop sandbox has one and is SINGLE-ATTACH under it, so asking twice resumes rather than leasing a second; an exec sandbox has none.
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? project;