@Override
    public boolean hasRegionMemStoreReplication() {
      return getOrDefault(REGION_MEMSTORE_REPLICATION_KEY, Boolean::valueOf,
        DEFAULT_REGION_MEMSTORE_REPLICATION);
    }
Returns true if the read-replicas memstore replication is enabled.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java