presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/CassandraClientConfig.java/CassandraClientConfig/setDcAwareLocalDC
class CassandraClientConfig:    @Config("cassandra.load-policy.dc-aware.local-dc")
    public CassandraClientConfig setDcAwareLocalDC(String dcAwareLocalDC)
    {
        this.dcAwareLocalDC = dcAwareLocalDC;
        return this;
    }