code: def _handle_metadata_file(
      self,
  ) -> Optional[Dict]:
      if os.path.exists(
          os.path.join(self._settings.files_dir, METADATA_FNAME)
      ):
          with open(
              os.path.join(self._settings.files_dir, METADATA_FNAME)
          ) as f:
              metadata: Dict = json.load(f)
          return metadata
  
      return None
  
imports: import json
  import logging
  import os
  import re
  import sys
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
  import wandb
  from wandb.sdk.artifacts.artifact import Artifact
  from wandb.sdk.data_types._dtypes import TypeRegistry
  from wandb.sdk.lib.filenames import DIFF_FNAME, METADATA_FNAME, REQUIREMENTS_FNAME
  from wandb.util import make_artifact_name_safe
  from .settings_static import SettingsStatic
label_desc: Use image node_id 17 for calling the JobBuilder obj's underlying member method code with example usage: obj._handle_metadata_file() and returns: None, metadata