code: def setup(app):
      # type: (Sphinx) -> Dict[unicode, Any]
      app.add_post_transform(MyConverter)
  
      return {
          "version": "builtin",
          "parallel_read_safe": True,
          "parallel_write_safe": True,
      }
  
imports: import shutil
  from sphinx.transforms.post_transforms.images import ImageConverter
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) and returns: dict