class_docstr: Load an application directory which modifies a Document.
      
class_docstr_tok: ["Load","an","application","directory","which","modifies","a","Document","."]
docstr: ``True`` if the handler failed to modify the doc
  
          
docstr_tok: ["``","True","``","if","the","handler","failed","to","modify","the","doc"]
code: def failed(self) -> bool:
      """``True`` if the handler failed to modify the doc"""
      return self._main_handler.failed or self._lifecycle_handler.failed
  
imports: from __future__ import annotations
  import logging
  import sys
  from os.path import basename, dirname, exists, join
  from types import ModuleType
  from typing import TYPE_CHECKING, Any, Coroutine
  from jinja2 import Environment, FileSystemLoader, Template
  from ...core.types import PathLike
  from ...document import Document
  from ..application import ServerContext, SessionContext
  from .code_runner import CodeRunner
  from .handler import Handler
  from .notebook import NotebookHandler
  from .script import ScriptHandler
  from .server_lifecycle import ServerLifecycleHandler
  from .server_request_handler import ServerRequestHandler
label_desc: Use image node_id 4 for calling the DirectoryHandler obj's underlying member method code with example usage: obj.failed() and returns: unknown