code: def save_cout(self):
      with open(os.path.join(self.dir, "cout.txt"), "ab") as f:
          f.write(self.cout[self.cout_write_cursor :].encode("utf-8"))
          self.cout_write_cursor = len(self.cout)
  
imports: import json
  import os
  import os.path
  from pathlib import Path
  from typing import Optional
  import warnings
  from shutil import copyfile, SameFileError
  from sacred.commandline_options import cli_option
  from sacred.dependencies import get_digest
  from sacred.observers.base import RunObserver
  from sacred import optional
  from sacred.serializer import flatten
  from sacred.utils import PathType
label_desc: Use image node_id 14 for calling the FileStorageObserver obj's underlying member method code with example usage: obj.save_cout() without return types