class_docstr: A parent class for Configurables that log.
  
  Subclasses have a log trait, and the default behavior
  is to get the logger from the currently running Application.
docstr: Return the default Handler
  
  Returns None if none can be found
  
  Deprecated, this now returns the first log handler which may or may
  not be the default one.
code: def _get_log_handler(self) -> logging.Handler | None:
      """Return the default Handler
  
      Returns None if none can be found
  
      Deprecated, this now returns the first log handler which may or may
      not be the default one.
      """
      if not self.log:
          return None
      logger: logging.Logger = (
          self.log
          if isinstance(self.log, logging.Logger)
          else self.log.logger
      )
      if not getattr(logger, "handlers", None):
          # no handlers attribute or empty handlers list
          return None
      return logger.handlers[0]
  
imports: from __future__ import annotations
  import logging
  import typing
  from copy import deepcopy
  from textwrap import dedent
  from traitlets.traitlets import Any, Container, Dict, HasTraits, Instance, TraitType, default, observe, observe_compat, validate
  from traitlets.utils import warnings
  from traitlets.utils.bunch import Bunch
  from traitlets.utils.text import indent, wrap_paragraphs
  from .loader import Config, DeferredConfig, LazyConfigValue, _is_section_key
label_desc: Use image node_id 3 for calling the LoggingConfigurable obj's underlying member method code with example usage: obj._get_log_handler() and returns: logger, None, None