code: func (s *specAggregator) GetAPIServiceNames() []string {
  	names := make([]string, len(s.openAPISpecs))
  	for key := range s.openAPISpecs {
  		names = append(names, key)
  	}
  	return names
  }
docs: // GetAPIServicesName returns the names of APIServices recorded in specAggregator.openAPISpecs.
  // We use this function to pass the names of local APIServices to the controller in this package,
  // so that the controller can periodically sync the OpenAPI spec from delegation API servers.