public static function businessIdentificationNumber(\DateTime $registrationDate = null)
{
if (!$registrationDate) {
$registrationDate = \Faker\Provider\DateTime::dateTimeThisYear();
}
$dateAsString = $registrationDate->format('ym');
$legalEntityType = (string) static::numberBetween(4, 6);
$legalEntityAdditionalType = (string) static::numberBetween(0, 3);
$randomDigits = (string) static::numerify('######');
return $dateAsString . $legalEntityType . $legalEntityAdditionalType . $randomDigits;
}