aggregate

class AggregateActor[Command[_], State, Event] extends PersistentActor with ActorLogging

Actor encapsulating state of event sourced entity behavior [Behavior]
class AkkaRuntime extends AnyRef
final case class AkkaRuntimeSettings(numberOfShards: Int, idleTimeout: FiniteDuration, askTimeout: FiniteDuration, clusterShardingSettings: ClusterShardingSettings) extends Product with Serializable
type Correlation[C[_]] = FunctionK[C, CorrelationIdF]
type CorrelationId = String
type CorrelationIdF[A] = String
trait Folder[F[_], A, B] extends AnyRef
sealed abstract class Identity extends Product with Serializable
sealed abstract class SnapshotPolicy[+E] extends Product with Serializable
sealed abstract class Tagging[A] extends AnyRef

object AggregateActor
object AkkaRuntime
object AkkaRuntimeSettings extends Serializable
object CorrelationId extends Serializable
object Folder
object Identity extends Serializable
object SnapshotPolicy extends Serializable
object StateRuntime
object Tagging

Please refer to akka-persistence-cassandra documentation and its reference.conf to understand how tagging works internally
package serialization