import org.opendaylight.controller.cluster.raft.RaftVersions;
import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
import org.opendaylight.controller.cluster.raft.persisted.SimpleReplicatedLogEntry;
-import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
/**
* Invoked by leader to replicate log entries (§5.3); also used as heartbeat (§5.2).