/// <summary>
 /// Determines whether the specified id has any values in the casche at all
 /// </summary>
 /// <param name="id">The identifier.</param>
 /// <returns>
 /// <c>true</c> if if the cache has any value for the id; otherwise, <c>false</c>.
 /// </returns>
 public bool HasAnyValue(string id)
 {
     return(_cache.Any(x => x.Key.StartsWith($"{id}{_idTypeSeparator}")));
 }