/// <summary>
/// Called when a relationship type is modified or deleted.
/// </summary>
/// <param name="relationshipTypes">
/// The relationship type that is about to be modified or deleted.
/// </param>
protected void InvalidateRelationshipTypes(IEnumerable <long> relationshipTypes)
{
IList <TKey> relationshipTypesKeys;
relationshipTypesKeys = relationshipTypes.SelectMany(relType => RelationshipTypeToCacheKey.GetValues(relType)).Distinct().ToList();
InvalidateCacheEntries(relationshipTypesKeys,
() => string.Format("relationship {0}", string.Join(",", relationshipTypes)));
}
