code: def save_file(self, filename, target_name=None):
      target_name = target_name or os.path.basename(filename)
      key = gcs_join(self.dir, target_name)
      self.put_data(key, open(filename, "rb"))
  
imports: import json
  import os
  import os.path
  import re
  from typing import Optional
  from sacred.commandline_options import cli_option
  from sacred.dependencies import get_digest
  from sacred.observers.base import RunObserver
  from sacred.serializer import flatten
  from sacred.utils import PathType
label_desc: Use image node_id 11 for calling the GoogleCloudStorageObserver obj's underlying member method code with example usage: obj.save_file(filename, target_name) without return types