+ * The pool busyness boolean status.
+ */
+ readonly busy: boolean
+
+ /**
+ * Number of tasks currently concurrently running.
+ */
+ readonly numberOfRunningTasks: number
+
+ /**
+ * Finds a free worker based on the number of tasks the worker has applied.
+ *
+ * If a worker is found with `0` running tasks, it is detected as free and returned.