sessionId property
SessionID is the sandbox this run used — the one that was passed in, or the fresh one that was leased. Pass it to the next run to keep the filesystem.
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? sessionId;