code: def save(self):
      with self.lock:
          self.session.commit()
  
imports: import json
  from threading import Lock
  import warnings
  from sacred.commandline_options import cli_option
  from sacred.observers.base import RunObserver
  from sacred.serializer import flatten
label_desc: Use image node_id 13 for calling the SqlObserver obj's underlying member method code with example usage: obj.save() without return types