public function e_onRegainHealth(EntityRegainHealthEvent $event)
{
$player = $event->getEntity();
if ($player instanceof Player and $event->getRegainReason() === EntityRegainHealthEvent::CAUSE_EATING) {
if ($player->getInventory()->getItemInHand()->getId() === Item::CARROT) {
$event->setAmount(3);
}
}
}