Method attackEntityFrom

src/main/java/net/minecraft/entity/Entity.java:1495–1506

Called when the entity is attacked.

(DamageSource source, float amount)

     * Called when the entity is attacked.
     */
    public boolean attackEntityFrom(DamageSource source, float amount)
    {
        if (this.isEntityInvulnerable(source))
        {
            return false;
        }
        else
        {
            this.setBeenAttacked();
            return false;
        }
    }

    /**
     * interpolated look vector