presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/JdbcSplitManager.java/JdbcSplitManager/JdbcSplitManager
class JdbcSplitManager:    @Inject
    public JdbcSplitManager(JdbcClient jdbcClient)
    {
        this.jdbcClient = requireNonNull(jdbcClient, "client is null");
    }