Akeneo\Component\SpreadsheetParser\Xlsx\Styles::readNext PHP Method

    protected function readNext()
    {
        $xml = $this->getXMLReader();
        while ($xml->read()) {
            if (\XMLReader::END_ELEMENT === $xml->nodeType && 'cellXfs' === $xml->name) {
                break;
            } elseif (\XMLReader::ELEMENT === $xml->nodeType && 'cellXfs' === $xml->name) {
                $this->inXfs = true;
            } elseif ($this->inXfs && \XMLReader::ELEMENT === $xml->nodeType && 'xf' === $xml->name) {
                $fmtId = $xml->getAttribute('numFmtId');
                if (isset($this->numberFormats[$fmtId])) {
                    $value = $this->numberFormats[$fmtId];
                } elseif (in_array($fmtId, $this->nativeDateFormats)) {
                    $value = static::FORMAT_DATE;
                } else {
                    $value = static::FORMAT_DEFAULT;
                }
                $this->values[] = $value;
                return;
            }
        }
        $this->valid = false;
        $this->closeXMLReader();
    }