code: def extendMarkdown(self, md, md_globals):
      img_ext = ImgExtractor(md)
      md.treeprocessors.add("imgext", img_ext, ">inline")
  
file_path: mlxtend/docs/ipynb2markdown.py
imports: import glob
  import os
  import shutil
  import subprocess
  import markdown
  from markdown.extensions import Extension
  from markdown.treeprocessors import Treeprocessor
  from nbconvert.exporters import MarkdownExporter
label_desc: Use image node_id 1 for calling the ImgExtExtension obj's underlying member method code with example usage: obj.extendMarkdown(md, md_globals) without return types