code: def add_source_suffix(
      self, suffix: str, filetype: str, override: bool = False
  ) -> None:
      logger.debug(
          "[app] adding source_suffix: %r, %r", suffix, filetype
      )
      if suffix in self.source_suffix and not override:
          raise ExtensionError(
              __("source_suffix %r is already registered") % suffix
          )
      self.source_suffix[suffix] = filetype
  
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 13 for calling the SphinxComponentRegistry obj's underlying member method code with example usage: obj.add_source_suffix(suffix, filetype, override) without return types