+ readonly kill?: 'failure' | 'success' | KillBehavior | true
+ /**
+ * Message port.
+ */
+ readonly port?: MessagePort
+ /**
+ * Whether the worker is ready or not.
+ */
+ readonly ready?: boolean
+ /**
+ * Whether the worker computes the given statistics or not.
+ */
+ readonly statistics?: WorkerStatistics
+ /**
+ * Task function serialized to string.
+ */
+ readonly taskFunction?: string
+ /**
+ * Task function operation:
+ * - `'add'` - Add a task function.
+ * - `'remove'` - Remove a task function.
+ * - `'default'` - Set a task function as default.
+ */
+ readonly taskFunctionOperation?: 'add' | 'default' | 'remove'
+ /**
+ * Whether the task function operation is successful or not.
+ */
+ readonly taskFunctionOperationStatus?: boolean