How to modify player xp drops on death

[JavaException]

How can I make the player drop all xp that he originally had, or like exactly 50%. I  tried to do it with an LivingDeathEvent but i'm not sure how to get the xp level of the player and drop that amount of xp.
Im on 19.3 

Edited March 14, 2023 by JavaException

[JavaException]

Nvm fixed it

 

@SubscribeEvent
    public void playerDeath(LivingExperienceDropEvent event) {
        if (event.getEntity() instanceof Player)
        {
            System.out.println(event.getOriginalExperience());
            event.setDroppedExperience(((Player) event.getEntity()).totalExperience);
        }
    }