public List<RemoteReplicaInfo> getRemoteReplicaInfos() {
      return remoteReplicaInfos;
    }
Constructor of {@link RemoteReplicaGroup}.
@param remoteReplicaInfos The list {@link RemoteReplicaInfo} that point to the list of replicas.
@param dataNodeId The remote data node
@param isNonProgressStandbyReplicaGroup True if this is standby replicas trying to catch up with the missing blob content. If true,
                         this group should start with REPLICA_METADATA_RESPONSE_HANDLED, since it already exchanged
                         ReplicaMetadata before and now wants to download missing blobs.
@param id The id of this RemoteReplicaGroup. This id should be unique at each cycle.
ambry-replication/src/main/java/com/github/ambry/replication/ReplicaThread.java