public Cassandra doWithClusterBuilder(final BiConsumer<Cluster.Builder, Config> configurer) {
    this.ccbuilder = requireNonNull(configurer, "ClusterBuilder conf callback required.");
    return this;
  }
public Cassandra doWithClusterBuilder(final BiConsumer<Cluster.Builder, Config> configurer) {
    this.ccbuilder = requireNonNull(configurer, "ClusterBuilder conf callback required.");
    return this;
  }
public Cassandra doWithClusterBuilder ( final BiConsumer < Cluster . Builder , Config > configurer ) { this . ccbuilder = requireNonNull ( configurer , "ClusterBuilder conf callback required." ) ; return this ; }
Configure a cluster before creating it.

@param configurer Configurer callback.
@return This module.
Configure a cluster before creating it .