private static string GenerateCacheKeyForRelation(NodeRelationType nodeRelationType, HiveId sourceId, HiveId destinationId)
 {
     return("NodeRelation-" + sourceId + "|" + destinationId + "|" + nodeRelationType.Alias);
 }
 private static string GenerateCacheKeyForRelation(IRelationById item, NodeRelationType nodeRelationType)
 {
     return(GenerateCacheKeyForRelation(nodeRelationType, item.SourceId, item.DestinationId));
 }