presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/jmx/StatisticsAwareJdbcClient.java/StatisticsAwareJdbcClient/StatisticsAwareJdbcClient
class StatisticsAwareJdbcClient:    public StatisticsAwareJdbcClient(JdbcClient delegate)
    {
        this.delegate = requireNonNull(delegate, "delegate is null");
    }