Quote::setFromExternalValue

protected function setFromExternalValue(string $commonFieldName, $value): Item
{
	if ($commonFieldName === static::FIELD_NAME_STORAGE_ELEMENTS && is_string($value))
	{
		$value = unserialize($value, ['allowed_classes' => false]);
		if (!is_array($value))
		{
			$value = [];
		}
	}

	return parent::setFromExternalValue($commonFieldName, $value);
}