lib/Jejik/MT940/Parser/Rabobank.php
protected function statementNumber($text)
    {
        if ($line = $this->getLine('60F', $text)) {
            if (preg_match('/(C|D)(\d{6})([A-Z]{3})([0-9,]{1,15})/', $line, $match)) {
                return $match[2];
            }
        }

        return null;
    }
protected function statementNumber($text)
    {
        if ($line = $this->getLine('60F', $text)) {
            if (preg_match('/(C|D)(\d{6})([A-Z]{3})([0-9,]{1,15})/', $line, $match)) {
                return $match[2];
            }
        }

        return null;
    }
Rabobank does not use statement numbers. Use the opening balance
date as statement number instead.

@param string $text Statement body text
@return string|null