code: def process_api_config_response(self, config_json):
      
      with self._config_lock:
        self._add_discovery_config()
        for config in config_json.get('items', []):
          lookup_key = config.get('name', ''), config.get('version', '')
          self._configs[lookup_key] = config
  
        for config in self._configs.itervalues():
          name = config.get('name', '')
          api_version = config.get('api_version', '')
          path_version = config.get('path_version', '')
          sorted_methods = self._get_sorted_methods(config.get('methods', {}))
  
  
          for method_name, method in sorted_methods:
            self._save_rest_method(method_name, name, path_version, method)
docs: Parses a JSON API config and registers methods for dispatch.
  
      Side effects:
        Parses method name, etc. for all methods and updates the indexing
        data structures with the information.
  
      Args:
        config_json: A dict, the JSON body of the getApiConfigs response.