protected function validate(Validator $v)
{
$v->whenNotNull(function (Validator $v) {
$v->allow(function (Validator $v) {
$v->notInt('The value is not a valid UNIX-TimeStamp');
})->allow(function (Validator $v) {
$v->notDateTime('The value is not a valid Date and Time string');
})->notPassed('The value is not a valid Date and/or Time');
});
}
