code: @Override
      protected Client instantiateClient(String persistenceUnit)
      {
          return new CouchbaseClient(kunderaMetadata, indexManager, reader, externalProperties, persistenceUnit,
                  this.bucket, this.clientMetadata);
      }
docs: /*
  (non-Javadoc)
  
  @see
  com.impetus.kundera.loader.GenericClientFactory#instantiateClient(java.
  lang.String)