public Cassandra doWithCluster(final Consumer<Cluster> configurer) {
    requireNonNull(configurer, "Cluster conf callbackrequired.");
    return doWithCluster((cc, c) -> configurer.accept(cc));
  }
public Cassandra doWithCluster(final Consumer<Cluster> configurer) {
    requireNonNull(configurer, "Cluster conf callbackrequired.");
    return doWithCluster((cc, c) -> configurer.accept(cc));
  }
public Cassandra doWithCluster ( final Consumer < Cluster > configurer ) { requireNonNull ( configurer , "Cluster conf callbackrequired." ) ; return doWithCluster ( ( cc , c ) -> configurer . accept ( cc ) ) ; }
Configure a cluster after creation.

@param configurer Configurer callback.
@return This module.
Configure a cluster after creation .