code: def bad(self):
      pass
  
imports: import webbrowser
  import pytest
  from mne import grade_to_tris, open_docs
  from mne.utils import catch_logging, copy_doc, copy_function_doc_to_method_doc, deprecated, deprecated_alias, legacy, linkcode_resolve
label_desc: Use image node_id 2 for calling the deprecated_class obj's underlying member method code with example usage: obj.bad() without return types