@Override
  public boolean isSealed() {
    return replicaSealStatus == ReplicaSealStatus.SEALED;
  }
Instantiate an AmbryReplica instance.
@param clusterMapConfig the {@link ClusterMapConfig} to use.
@param partition the {@link AmbryPartition} of which this is a replica.
@param isReplicaStopped whether this replica is stopped or not.
@param capacityBytes the capacity in bytes for this replica.
@param replicaSealStatus {@link ReplicaSealStatus} of this replica.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/AmbryReplica.java