code: def get_refactor_options(self, start, end=None):
          
          result = []
          for symbol in dir(self):
              if not symbol.startswith("refactor_"):
                  continue
              method = getattr(self, symbol)
              if not method.refactor_notes.get('available', True):
                  continue
              category = method.refactor_notes['category']
              if end is not None and category != 'Region':
                  continue
              if end is None and category == 'Region':
                  continue
              is_on_symbol = self._is_on_symbol(start)
              if not is_on_symbol and category in ('Symbol', 'Method'):
                  continue
              requires_import = method.refactor_notes.get('only_on_imports',
                                                          False)
              if requires_import and not self._is_on_import_statement(start):
                  continue
              result.append(method.refactor_notes)
          return result
docs: Return a list of options for refactoring at the given position.
  
          If `end` is also given, refactoring on a region is assumed.
  
          Each option is a dictionary of key/value pairs. The value of
          the key 'name' is the one to be used for get_changes.
  
          The key 'args' contains a list of additional arguments
          required for get_changes.