code: def to_flatbuffer(self, to_flatbuff, color_enum):
      self.get_flatbuffer_file_names()
      self.replace_filename_in_stderr()
      self.replace_test_input_files()
      self.convert(to_flatbuff, color_enum)
      self.replace_vw_command()
  
imports: import copy
  import os
  import os.path
  import shlex
  import subprocess
  from pathlib import Path
  import re
  from typing import List, Optional, Tuple
  from run_tests_common import TestData
label_desc: Use image node_id 9 for calling the FlatbufferTest obj's underlying member method code with example usage: obj.to_flatbuffer(to_flatbuff, color_enum) without return types