code: def convert(self, to_flatbuff, color_enum):
      # arguments and flats not supported or needed in flatbuffer conversion
      flags_to_remove = [
          "-c ",
          "--bfgs",
          "--onethread",
          "-t ",
          "--search_span_bilou",
      ]
      arguments_to_remove = [
          "--passes",
          "--ngram",
          "--skips",
          "-q",
          "-p",
          "--feature_mask",
          "--search_kbest",
          "--search_max_branch",
      ]
  
      # if model already exists it contains needed arguments so use it in conversion
      use_model = False
      for input_file in self.stashed_input_files:
          if "model-set" in input_file:
              use_model = True
  
      if not use_model:
          arguments_to_remove.append("-i")  # lose the model input
  
      # The command line already has the vw binary prepended - so snip it off for this
      to_flatbuff_command = (
          remove_first_arg(self.depends_on_cmd)
          if self.depends_on_cmd is not None
          else remove_first_arg(self.test.command_line)
      )
      to_flatbuff_command = self.remove_arguments(
          to_flatbuff_command, arguments_to_remove
      )
      to_flatbuff_command = self.remove_arguments(
          to_flatbuff_command, flags_to_remove, flags=True
      )
  
      for i, from_file, to_file in self.files_to_be_converted:
          # replace depends_on filename with our filename, will do nothing if no depends_on
          to_flatbuff_command = re.sub(
              "{} [:a-zA-Z0-9_.\-/]*".format("-d"),
              "",
              to_flatbuff_command,
          )
          to_flatbuff_command = f"-d {from_file} " + to_flatbuff_command
  
          cmd = "{} {} {} {}".format(
              to_flatbuff, to_flatbuff_command, "--fb_out", to_file
          )
          if (
              self.depends_on_cmd is not None
              and "audit" in self.test.command_line
          ):
              cmd += " --audit"
          print(
              "{}CONVERT COMMAND {} {}{}".format(
                  color_enum.LIGHT_PURPLE,
                  self.test_id,
                  cmd,
                  color_enum.ENDC,
              )
          )
          result = subprocess.run(shlex.split(cmd), check=True)
          if result.returncode != 0:
              raise RuntimeError(
                  "Generating flatbuffer file failed with {} {} {}".format(
                      result.returncode, result.stderr, result.stdout
                  )
              )
  
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 7 for calling the FlatbufferTest obj's underlying member method code with example usage: obj.convert(to_flatbuff, color_enum) without return types