Method getCurrentTask

flow/Net2.actor.cpp:191–191

	Future<class Void> yield(TaskPriority taskID) override;
	bool check_yield(TaskPriority taskId) override;
	TaskPriority getCurrentTask() const override { return currentTaskID; }
	void setCurrentTask(TaskPriority taskID) override {
		currentTaskID = taskID;
		priorityMetric = (int64_t)taskID;