def IsDirectory(self):
    raise NotImplementedError
Start the threads.
dataset/ETHPy150Open google/grr/grr/client/vfs.py/VFSHandler.IsDirectory--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python3-alpha/python-libs/pyxmpp2/mainloop/threads.py/ThreadPool.start