https://pekko.apache.org/japi/pekko/current/org/apache/pekko/cluster/sharding/ClusterShardingSettings.PassivationStrategySettings$.AdmissionSettings$.html
ClusterShardingSettings.PassivationStrategySettings$.AdmissionSettings$
https://pekko.apache.org/japi/pekko/1.0/org/apache/pekko/cluster/sharding/ClusterShardingSettings.PassivationStrategySettings$.html
ClusterShardingSettings.PassivationStrategySettings$