code: def read(
      self, location: tuple[str, int] | None = None
  ) -> tuple[str, int]:
      if "diff" in self.options:
          lines = self.show_diff()
      else:
          filters = [
              self.pyobject_filter,
              self.start_filter,
              self.end_filter,
              self.lines_filter,
              self.dedent_filter,
              self.prepend_filter,
              self.append_filter,
          ]
          lines = self.read_file(self.filename, location=location)
          for func in filters:
              lines = func(lines, location=location)
  
      return "".join(lines), len(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 4 for calling the LiteralIncludeReader obj's underlying member method code with example usage: obj.read(location) and returns: str,  len