/// <summary>
 /// Determines whether [the specified lookup key] [contains] the value.
 /// </summary>
 /// <param name="lookupKey">The lookup key.</param>
 /// <param name="candidate">The candidate.</param>
 /// <returns>
 /// <c>true</c> if [the specified lookup] [contains]; otherwise, <c>false</c>.
 /// </returns>
 public bool Contains(LookupSimpleKey lookupKey, int candidate)
 {
     return(InternalCache.SimpleLookups[lookupKey].Contains(candidate));
 }