class_docstr: Class which wraps a statsmodels estimation Results class and steps in to
  reattach metadata to results (if available)
code: def __dir__(self):
      return [x for x in dir(self._results)]
  
file_path: statsmodels/statsmodels/base/wrapper.py
imports: import functools
  import inspect
  from textwrap import dedent
label_desc: Use image node_id 2 for calling the ResultsWrapper obj's underlying member method code with example usage: obj.__dir__() and returns: unknown