public function getFilters()
{
return [new Twig_SimpleFilter('format_date', function ($dateTime, $diffForHumans = true) {
if (!$dateTime) {
return;
}
$format = 'Y-m-d H:i:s';
return $dateTime->format($format);
}), new Twig_SimpleFilter('timestamp', function ($dateTime) {
return $this->toCarbon($dateTime)->getTimestamp();
}), new Twig_SimpleFilter('iso_8601', function ($dateTime) {
return $this->toCarbon($dateTime)->format(Carbon::ISO8601);
})];
}