class_docstr: Load a script which contains server lifecycle callbacks.
  
      
class_docstr_tok: ["Load","a","script","which","contains","server","lifecycle","callbacks","."]
docstr: If the handler fails, may contain a traceback or other details.
  
          
docstr_tok: ["If","the","handler","fails",",","may","contain","a","traceback","or","other","details","."]
code: def error_detail(self) -> str | None:
      """If the handler fails, may contain a traceback or other details."""
      return self._runner.error_detail
  
file_path: bokeh/src/bokeh/application/handlers/server_lifecycle.py
imports: from __future__ import annotations
  import logging
  import os
  from types import ModuleType
  from ...core.types import PathLike
  from ...util.callback_manager import _check_callback
  from .code_runner import CodeRunner
  from .lifecycle import LifecycleHandler
label_desc: Use image node_id 3 for calling the ServerLifecycleHandler obj's underlying member method code with example usage: obj.error_detail() and returns: self