code: def add_directive_to_domain(
      self,
      domain: str,
      name: str,
      cls: type[Directive],
      override: bool = False,
  ) -> None:
      logger.debug(
          "[app] adding directive to domain: %r", (domain, name, cls)
      )
      if domain not in self.domains:
          raise ExtensionError(
              __("domain %s not yet registered") % domain
          )
  
      directives: dict[
          str, type[Directive]
      ] = self.domain_directives.setdefault(domain, {})
      if name in directives and not override:
          raise ExtensionError(
              __("The %r directive is already registered to domain %s")
              % (name, domain)
          )
      directives[name] = cls
  
imports: from __future__ import annotations
  import sys
  import traceback
  from importlib import import_module
  from types import MethodType
  from typing import TYPE_CHECKING, Any, Callable
  from sphinx.domains import Domain, Index, ObjType
  from sphinx.domains.std import GenericObject, Target
  from sphinx.errors import ExtensionError, SphinxError, VersionRequirementError
  from sphinx.extension import Extension
  from sphinx.io import create_publisher
  from sphinx.locale import __
  from sphinx.parsers import Parser
  from sphinx.roles import XRefRole
  from sphinx.util import logging
  from sphinx.util.logging import prefixed_warnings
label_desc: Use image node_id 8 for calling the SphinxComponentRegistry obj's underlying member method code with example usage: obj.add_directive_to_domain(domain, name, cls, override) without return types