code: def _save(im, fp, filename):
      if _handler is None or not hasattr(_handler, "save"):
          msg = "BUFR save handler not installed"
          raise OSError(msg)
      _handler.save(im, fp, filename)
  
file_path: pillow/src/PIL/BufrStubImagePlugin.py
imports: from __future__ import annotations
  from .None import Image, ImageFile
label_desc: Use image node_id 3 for calling a global function with example usage: _save(im, fp, filename) without return types