A suggested method for EntityDamageEvent:
getAddedVelocity(): Vector

This represents the velocity that was added to the victim's velocity when they were damaged.

I suggest this method since I am working on a plugin that involves consistently multiplying the knock-back that one player does to another. I want to multiply the knock-back because:

• The player will have a power-level
• They can have various weapons that contribute to the knock-back
• The victim can have an attribute modifier that reduces their knock-back

If John acquires a Knockback-2 sword and his "power level" multiplies his abilities by 10, his power level will enhance the knock-back energy delivered by the sword by ten-times. It will not add. This is why it can sometimes be important to know how much velocity is added to the entity when it is damaged.

I am unsure as to how this can apply to EntityDamageEvent aside from EntityDamageByEntityEvent. I have tried to think about cases where anything that isn't an entity can knock an entity back by damaging it, but I don't seem to recall any. Damage sources such as lava, magma blocks, sweet berry bushes, etc will just return 0 for this method? Maybe in the future these causes might contribute knockback for some reason.