class_docstr: Add inline processor to Markdown. 
class_docstr_tok: ["Add","inline","processor","to","Markdown","."]
code: def extendMarkdown(self, md):
      self.md = md
  
      # append to end of inline patterns
      WIKILINK_RE = r"\[\[([\w0-9_ -]+)\]\]"
      wikilinkPattern = WikiLinksInlineProcessor(
          WIKILINK_RE, self.getConfigs()
      )
      wikilinkPattern.md = md
      md.inlinePatterns.register(wikilinkPattern, "wikilink", 75)
  
file_path: markdown/markdown/extensions/wikilinks.py
imports: from __future__ import annotations
  from .None import Extension
  from ..inlinepatterns import InlineProcessor
  import xml.etree.ElementTree
  import re
  from typing import Any
label_desc: Use image node_id 2 for calling the WikiLinkExtension obj's underlying member method code with example usage: obj.extendMarkdown(md) without return types