cluster-tools/src/main/scala/org/apache/pekko/cluster/singleton/ClusterSingletonManager.scala
cluster-typed/src/main/scala/org/apache/pekko/cluster/typed/ClusterSingleton.scala

cluster-tools/src/main/protobuf/DistributedPubSubMessages.proto
cluster-typed/src/main/protobuf/ReliableDelivery.proto

cluster-tools/src/main/protobuf/ClusterClientMessages.proto
cluster-typed/src/main/protobuf/ClusterMessages.proto

cluster-tools/src/main/protobuf/ClusterClientMessages.proto
cluster-typed/src/main/protobuf/ReliableDelivery.proto

cluster-tools/src/main/protobuf/DistributedPubSubMessages.proto
cluster-typed/src/main/protobuf/ClusterMessages.proto