code: def _co_names_from_config(self):
          
          co_names = [co[self.KEY_ENCODEABLE_NAME] for
                      co in self.config[self.KEY_CO]]
  
          return co_names
docs: Parse the configuration for the names of the COs for which to
          construct virtual IdPs.
  
          :rtype: [str]
  
          :return: list of CO names