- * @param data - The task input data for the specified function. This can only be serializable data.
- * @returns Promise that will be resolved when the task is successfully completed.
+ * If a worker is found with `0` running tasks, it is detected as free and its worker node key is returned.
+ *
+ * If no free worker is found, `-1` is returned.
+ *
+ * @returns A worker node key if there is one, `-1` otherwise.
+ */
+ findLastFreeWorkerNodeKey: () => number
+ /**
+ * Executes the function specified in the worker constructor with the task data input parameter.
+ *
+ * @param data - The task input data for the specified worker function. This can only be serializable data.
+ * @returns Promise that will be fulfilled when the task is completed.