Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Xlsx/Chart.php
private static function getAttribute(SimpleXMLElement $component, $name, $format)
    {
        $attributes = $component->attributes();
        if (isset($attributes[$name])) {
            if ($format == 'string') {
                return (string) $attributes[$name];
            } elseif ($format == 'integer') {
                return (int) $attributes[$name];
            } elseif ($format == 'boolean') {
                return (bool) ($attributes[$name] === '0' || $attributes[$name] !== 'true') ? false : true;
            }

            return (float) $attributes[$name];
        }

        return null;
    }
private static function getAttribute(SimpleXMLElement $component, $name, $format)
    {
        $attributes = $component->attributes();
        if (isset($attributes[$name])) {
            if ($format == 'string') {
                return (string) $attributes[$name];
            } elseif ($format == 'integer') {
                return (int) $attributes[$name];
            } elseif ($format == 'boolean') {
                return (bool) ($attributes[$name] === '0' || $attributes[$name] !== 'true') ? false : true;
            }

            return (float) $attributes[$name];
        }

        return null;
    }
@param SimpleXMLElement $component
@param string $name
@param string $format

@return null|bool|float|int|string