presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/JdbcPageSink.java/JdbcPageSink/closeWithSuppression
class JdbcPageSink:    @SuppressWarnings("ObjectEquality")
    private static void closeWithSuppression(Connection connection, Throwable throwable)
    {
        try {
            connection.close();
        }
        catch (Throwable t) {
            // Self-suppression not permitted
            if (throwable != t) {
                throwable.addSuppressed(t);
            }
        }
    }