class_docstr: Helper class providing methods for saving changes made to an experiment
  if `db_settings` property is set to a non-None value on the instance.
class_docstr_tok: ["Helper","class","providing","methods","for","saving","changes","made","to","an","experiment","if","`","db_settings","`","property","is","set","to","a","non-None","value","on","the","instance","."]
docstr: Overridable method to get default db_settings
  if none are passed in __init__
docstr_tok: ["Overridable","method","to","get","default","db_settings","if","none","are","passed","in","__init__"]
code: def _get_default_db_settings() -> Optional[DBSettings]:
      """Overridable method to get default db_settings
      if none are passed in __init__
      """
      return None
  
imports: import re
  import time
  from logging import INFO, Logger
  from typing import Any, Dict, List, Optional, Tuple, Type
  from ax.core.base_trial import BaseTrial
  from ax.core.experiment import Experiment
  from ax.core.generation_strategy_interface import GenerationStrategyInterface
  from ax.core.generator_run import GeneratorRun
  from ax.exceptions.core import IncompatibleDependencyVersion, ObjectNotFoundError, UnsupportedError
  from ax.modelbridge.generation_strategy import GenerationStrategy
  from ax.utils.common.executils import retry_on_exception
  from ax.utils.common.logger import _round_floats_for_logging, get_logger
  from ax.utils.common.typeutils import not_none
label_desc: Use image node_id 2 for calling the WithDBSettingsBase obj's underlying member method code with example usage: obj._get_default_db_settings() and returns: None