def tearDown(self):
    self._file_system.Close()
@summary Same as tradesim, but combines open and close data into one.
dataset/ETHPy150Open log2timeline/dfvfs/tests/vfs/encrypted_stream_file_entry.py/EncryptedStreamFileEntryTest.tearDown--crossover with--dataset/ETHPy150Open QuantSoftware/QuantSoftwareToolkit/QSTK/qstksim/tradesim.py/tradesim_comb