code: def dedent_filter(
      self,
      lines: list[str],
      location: tuple[str, int] | None = None,
  ) -> list[str]:
      if "dedent" in self.options:
          return dedent_lines(
              lines, self.options.get("dedent"), location=location
          )
      else:
          return lines
  
imports: from __future__ import annotations
  import sys
  import textwrap
  from difflib import unified_diff
  from typing import TYPE_CHECKING, Any
  from docutils import nodes
  from docutils.parsers.rst import directives
  from docutils.statemachine import StringList
  from sphinx import addnodes
  from sphinx.directives import optional_int
  from sphinx.locale import __
  from sphinx.util import logging, parselinenos
  from sphinx.util.docutils import SphinxDirective
label_desc: Use image node_id 12 for calling the LiteralIncludeReader obj's underlying member method code with example usage: obj.dedent_filter(lines, location) and returns: dedent_lines, lines