/home/kueuepay/public_html/vendor/maatwebsite/excel/src/Middleware/ConvertEmptyCellValuesToNull.php

<?php

namespace Maatwebsite\Excel\Middleware;

class ConvertEmptyCellValuesToNull extends CellMiddleware
{
    /**
     * @param  mixed  $value
     * @return mixed
     */
    public function __invoke($value, callable $next)
    {
        return $next(
            $value === '' ? null : $value
        );
    }
}

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In case of an error, the API will return an error response containing a specific error code 400, 403 Failed and a user-friendly message. Refer to our API documentation for a comprehensive list of error codes and their descriptions.