code: def flush(self) -> None:
      self._file.flush()
  
imports: import os
  import shutil
  import sys
  from typing import Optional
  from typing import Sequence
  from typing import TextIO
  from .wcwidth import wcswidth
  from _pytest.compat import final
label_desc: Use image node_id 9 for calling the TerminalWriter obj's underlying member method code with example usage: obj.flush() without return types