code: func InsertPredicateKeyToAlgorithmProviderMap(key string) {
  	schedulerFactoryMutex.Lock()
  	defer schedulerFactoryMutex.Unlock()
  
  	for _, provider := range algorithmProviderMap {
  		provider.FitPredicateKeys.Insert(key)
  	}
  	return
  }
docs: // InsertPredicateKeyToAlgorithmProviderMap insert a fit predicate key to all algorithmProviders which in algorithmProviderMap.