code: func NewLocalMapStorage(
  	name string,
  	KeyStringFunc ToStringFunc,
  	ItemToKeyStringFunc ToStringFunc) Storage {
  
  	_, storage := newLocalMapStorage(name, KeyStringFunc, ItemToKeyStringFunc)
  	return storage
  }
docs: // This returns a local non-persistent storage which uses map[string]interface{}
  // as its underlying storage.