/**
  * Format the value.
  *
  * @param null $format
  * @return null|string
  */
 public function format($format = 'm/d/Y')
 {
     $value = $this->object->getValue();
     if ($value && $value instanceof Carbon) {
         return $value->format($format);
     }
     return null;
 }
 /**
  * Return the "time ago" formatted string.
  *
  * @return null|string
  */
 public function timeAgo()
 {
     $value = $this->object->getValue();
     if ($value instanceof Carbon) {
         return $value->setTimezone(config('app.timezone'))->diffForHumans();
     }
     return null;
 }