code: def noneable(x: Any) -> Optional[Any]:
      if not x:
          return None
      return x
  
imports: import datetime
  import json
  from typing import List, Dict, Any, Optional, MutableMapping
  from google.protobuf import timestamp_pb2
  from .servicepb import keepsake_pb2
  from .experiment import Experiment
  from .checkpoint import Checkpoint, PrimaryMetric, CheckpointList
label_desc: Use image node_id 20 for calling a global function with example usage: noneable(x) and returns: x, None