code: def get_source_parser(self, filetype: str) -> type[Parser]:
      try:
          return self.source_parsers[filetype]
      except KeyError as exc:
          raise SphinxError(
              __("Source parser for %s not registered") % filetype
          ) from exc
  
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 15 for calling the SphinxComponentRegistry obj's underlying member method code with example usage: obj.get_source_parser(filetype) and returns: self