code: def second(self, printSecond: "Callable[[], None]") -> None:
      # Wait for the first job to be done
      with self.firstJobDone:
          # printSecond() outputs "second".
          printSecond()
          # Notify the thread that is waiting for the second job to be done.
          self.secondJobDone.release()
  
imports: from threading import Lock
label_desc: Use image node_id 3 for calling the Foo obj's underlying member method code with example usage: obj.second(printSecond) without return types