Getting PotionType in ProjectileLaunchEvent

So, I've been messing around with my plugin for quite a while now, and recently I tried to get involved with messing around with the velocity of splash potions, and have run into a problem.

This is the event I'm using:

Code:

void onProjectileLaunch(final ProjectileLaunchEvent e) {

Obviously, I am trying to get the PotionType from a splash potion from "e", however, have had no luck in doing so.

 

or try messing around with PotionSplashEvent.

 

I've tried to do this, however, my IDE complains about it being an inconvertible type.

I'm messing around with velocity, and I'm pretty sure I cannot modify the velocity from this event.

 

@Artellet try:

Code:

    @EventHandler
    void onProjectileLaunch(final ProjectileLaunchEvent e) {
        if(e.getEntityType() == EntityType.SPLASH_POTION){
            ThrownPotion potion = (ThrownPotion) e.getEntity();
            for(PotionEffect effect : potion.getEffects()){
                PotionEffectType effecttype= effect.getType();
                if(effecttype == PotionEffectType.INVISIBILITY){
                    //do stuf
                }
            }
        }
    }

 

I would need to use PotionType, not PotionEffectType, as it does not work at all.

How?