code: def _run_action(self, path_segment, **kwargs):
          
          response = self.get(path_segment, **kwargs)
          data = self._load_atom_entry(response)
          rec = _parse_atom_entry(data)
          return rec.content
docs: Run a method and return the content Record from the returned XML.
  
          A method is a relative path from an Entity that is not itself
          an Entity. _run_action assumes that the returned XML is an
          Atom field containing one Entry, and the contents of Entry is
          what should be the return value. This is right in enough cases
          to make this method useful.