code: def file_to_stream(self, file_path, stream_path):
      cmd = [_FILE_TO_STREAM, file_path, ">", stream_path]
      self.run_shell_command(cmd)
  
imports: import contextlib
  import functools
  import os
  import subprocess
  from .None import cdata
  from .tester import Tester, CDataExporter, CDataImporter
  from .util import run_cmd, log
  from ..utils.source import ARROW_ROOT_DEFAULT
label_desc: Use image node_id 5 for calling the CppTester obj's underlying member method code with example usage: obj.file_to_stream(file_path, stream_path) without return types